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Tim Demko @timdemko.xyz · 10/08/2026

Same event on my RaspberryShake 4D seismometer in Lexington, Kentucky USA

Screenshot of ShakeNet app showing seismograph of magnitude 7.4 earthquake in Columbia on August 10, 2026, as recorded by a RaspberryShake 4D seismometer in Lexington, Kentucky USA.

Tim Demko @timdemko.xyz · 06/08/2026

I used these outcrops for the classes I taught at University of Minnesota Duluth. There is actually quite a long section exposed downstream of the dam. Yes there is foliation, but bed boundaries are still discernible, as well as enough sed structures to determine way-up.

Photos of students measuring stratigraphic sections in a river gorge.

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Tim Demko @timdemko.xyz · 09/06/2026

Big Irwin Mainway vibes

Dan Ackroyd and Candice Bergen in the Saturday Night Live Sketch about a sleazy toy manufacturer, Irwin Mainway (Ackroyd), who sells extremely dangerous toys. Ackroyd is holding a plastic bag of broken glass, the "Bag O' Glass" toy.

Dan Ackroyd in a Saturday Night Live Sketch about a sleazy toy manufacturer, Irwin Mainway (Ackroyd), who sells extremely dangerous toys. Ackroyd is holding a bag containing a plastic dry cleaning bag, the "Johnny Space Commander" toy.

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Tim Demko @timdemko.xyz · 30/05/2026

Here are responses from nearby Raspberry Shake seismometers, on the left a RS 4D in Titusville, FL 34 km to the NW, and on the right a RS 3D between Vienna and Melbourne, FL 38 km to the SW of the event. The 4D picked up higher frequency vibrations (peak ~6Hz) while the 3D recorded lower (~0.85 Hz).

Illustration of seismic response of the Blue Origin New Glenn rocket test failure. The figure has three sections: the time-series waveforms, a spectrogram of the frequencies, and a power spectrum.

Map of the Florida coast, showing positions of the Blue Origin New Glenn rocket test failure and explosion, and two Raspberry Shake seismometers that recorded vibrations from the event.

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Tim Demko @timdemko.xyz · 09/05/2026

Best film adaptation of The Odyssey, wrong answers only

Movie poster for the 1985 Martin Scorsese film "After Hours". The poster depicts the lead actor, Griffin Dunne, running through a geometrically-confusing urban scene. Dunne is wearing a light colored blazer and pants, a dark striped shirt, and brown shoes.

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Tim Demko @timdemko.xyz · 11/04/2026

Astronaut Leland Melvin FTW www.reddit.com/r/space/s/Dn...

Official NASA portrait of astronaut Leland Melvin and his dogs.

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Tim Demko @timdemko.xyz · 03/03/2026

I've started my new job as a geologist with the Kentucky Geological Survey. There are exhibits of two types of fossil trees in and around the KGS building: a cast of a Carboniferous lycopod (my MS thesis) and petrified wood from the Triassic Chinle Formation (my PhD). The universe is a closed loop.

Photo of the entrance to the Mining and Mineral Resources Building on the University of Kentucky campus, the home of the Kentucky Geological Survey.

Photos of the geologic map of the State of Kentucky.

Text on the map reads: Celebrating Geologic Mapping in Kentucky, first in the United States: topographic maps (1:24000 scale), geologic maps (1:24000 scale), digital geology, web accessibility

Photo of a fossil casted tree stump and attached rooting structures. This Carboniferous-age tree was a club moss (lycopod), and the rooting structures are called Stigmaria.

Photo of a polished slab of colorful petrified wood. Tree rings are visible in the red, gray, and black mineralized wood.

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Tim Demko @timdemko.xyz · 27/01/2026

You could also make the Grand Tour, visiting the Salton Sea Mud Volcanos and visit the tourist haunts of the Republic of Slowjamistan. Don't forget the guacamole recipe! vimeo.com/128414770?fl...

Photo of a woman and man standing in front of a sign which read "Republic of Slowjamistan www.slowjamistan.org". It is in a stark desert landscape, with a blue sky and wispy cirrus clouds/

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Tim Demko @timdemko.xyz · 08/01/2026

I rarely post photos of myself, especially in uniform, but the events of today are clashing mightily with the stupendous day I had in the field yesterday. Here I am, mid geologizing mode, waxing eloquently about some fascinating details of the 1.7 byo schist in the background. Must remember...

A photo of a geologist standing on an outcrop, pointing to a cliff face in the background. He is holding a map board, there are trees, and clouds in a brilliant Arizona blue sky. It was a good. No, great.

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Tim Demko @timdemko.xyz · 02/01/2026

Here is the response from the earthquake near Acapulco, Mexico on my RaspberryShake 4D seismometer near Phoenix, Arizona USA, 2252 km from the event.

Illustration showing seismometer response to a magnitude 6.5 earthquake which occurred near Acapulco, Mexico on January 2 at 13:58:18 UTC. There is a map on the left which shows the location of the earthquake, connected with a great circle path to the location of the seismometer near Phoenix, Arizona USA. There are time-series plots of the seismic waveform and frequency on the right.

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Tim Demko @timdemko.xyz · 02/01/2026

Well, this should be a very interesting year...I think

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Tim Demko @timdemko.xyz · 31/12/2025

Same event on my RaspberryShake 4D near Phoenix, Arizona USA, 8,774 km away.

Illustration showing a seismometer response near Phoenix, Arizona USA to an earthquake near Honshu, Japan. On the left, there is a map showing the location of the earthquake and a great circle line to the location of the seismometer. On the right are time-series plots of the waveform (a line showing the amplitude expressed as vertical velocity in microns/second) and frequency (graphically expressed in a color representation in Hertz).

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Tim Demko @timdemko.xyz · 20/12/2025

"Ghost Ranch block" (Triassic Chinle Formation), preserving numerous Coelophysis dinosaurs and other reptiles. This block is in collections of the Museum of Northern Arizona in Flagstaff, AZ USA. 16 of these blocks were distributed from New Mexico to museums and schools in the 1980s. #fossilfriday

Photo of a block of Upper Triassic Chinle Formation from Ghost Ranch, New Mexico USA that preserves numerous Coelophysis dinosaurs and other small reptiles. There is a life-size drawing of a Coelophysis dinosaur behind the block of rock. The block is in the crowded collections room back-stage in a museum.

Close-up photo of a block of Upper Triassic Chinle Formation from Ghost Ranch, New Mexico USA that preserves numerous Coelophysis dinosaurs and other small reptiles. There are numerous small bones of a crocodylomorph reptile exposed in a block of light reddish brown siltstone. There is a sign on the block that says "Please do not touch!".

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Tim Demko @timdemko.xyz · 18/12/2025

The tracks were so fresh-looking, we could almost smell the critters!

Photo of a rock with the cast of a reptile footprint. There is a pen for scale.

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Tim Demko @timdemko.xyz · 18/12/2025

Spectacular scenery, weather, and colleagues! And the tracks and traces weren't bad either!

Photo of a group of people near a white pickup truck. They are in a rocky desert setting, with snow-capped peaks in the distance.

Photo of a rock slab, the base of a sandstone block with numerous tracks, trails, and other trace fossils. There is a boot for scale.

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Tim Demko @timdemko.xyz · 10/12/2025

We spent 10 days beach camping in northern Baja, going out every low tide to spy G. palmeri colonies, looking for the slit-like burrows, measuring individual burrow widths, excavating the makers and measuring their shell widths. Ended up with 75 individual measurements.(3/3) doi.org/10.1111/j.15...

Comparison of size-structure in two populations of Glottidia
palmeri from tidal flats of northeastern Baja California. Black bars
denote the population from Campo Don Abel and dotted bars the population from Vega Island. Comparison of size-structure of two populations as revealed by width of shells collected alive. UB. Comparison of the same two populations with use of burrow width.

Comparison of burrow and shell width in two populations of
Glottidia palmeri, northeastern Baja California, Mexico.

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Tim Demko @timdemko.xyz · 26/11/2025

You’ve been kidnapped. The characters from the last TV show you watched are trying to rescue you. Who’s coming to save you? If I've been kidnapped by the Danes, I think I'm good...destiny is all!

Photo from the TV show "The Last Kingdom" with the characters Uhtred, Finn, and Sihtric.

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Tim Demko @timdemko.xyz · 14/11/2025

For me, it was just looking at the title of this book in a university bookstore, probably sometime Spring semester 1991. I picked it up, turned right to font section, and within minutes, the lightbulb popped up above my head. Never looked back!

Image of the cover of the book "The Mac is not a typewriter". On the cover is an image of an old Corona typewriter.

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Tim Demko @timdemko.xyz · 06/10/2025

After liking this post and reading the linked paper, I was keen to see if I'm missing these features in outcrops. Tooling around some basalt flows along Kona Coast in Hawaii today (Shoreline Park, just west of Kealakekua)...well, yep! Will be keeping my eye peeled for these in older flows in AZ!

$Photo of the an outcrop of dark gray vesicular basalt, exhibiting fracture patterns of two natural explosion structures. The structures look like cavities surrounded by radially-oriented fractures. My sandaled foot is also shown, for scale.$

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Tim Demko @timdemko.xyz · 03/10/2025

Any self-respecting ichnologist despises fish because they can make the most frustratingly uninterpretable traces. www.livescience.com/63627-puffer...

Photo of a Japanese pufferfish posing defiantly in front of its needlessly complicated and beautiful sea floor sand sculpture. Asshole!

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Tim Demko @timdemko.xyz · 13/09/2025

Here is the response from the event on my RaspberryShake 4D seismometer near Phoenix, AZ USA

Seismogram of 7.4 magnitude earthquake off Kamchatka as measured on a RaspberryShake 4D seismometer near Phoenix, AZ USA. The figure is a composite diagram with 3 parts: an upper record of the seismic wave amplitude over time, a middle part showing the frequency spectrum over time, and a lower graph of the complete frequency spectrum over the time interval of the upper two parts

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Tim Demko @timdemko.xyz · 09/09/2025

After poking around and finding the base of the flow, the story became much richer: the basalt had flowed over some eolian dunes which sourced the water for the hydrothermal system. The sand might have accumulated as obstacle dunes around a bedrock hill, then buried by the flow in a valley. (2/2)

$Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. The basalt exhibits intense fracturing, with light colored fracture fills. the contact is very sharp. There is an archaeologist (Madi Whalen) for scale.$ $Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. The basalt exhibits intense fracturing, with light colored fracture fills. There is an archaeologist (Madi Whalen) for scale.$ $Outcrop photo of Miocene eolian dune deposits overlain by vesicular basalt. The dune deposits are light orange-brown and characterized by wind ripple/translatent (pin-stripe) laminations, and the basalt is very dark reddish brown. The basalt exhibits intense fracturing, especially at the contact with the underlying sandstone, with light colored fracture fills. The units and the contact are offset by a small vertical fault.$

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Tim Demko @timdemko.xyz · 09/09/2025

Saw these outcrops of the mineralized, brecciated top of a Miocene basalt flow today, evidence of an epithermal hydrothermal system. This indicates the interactions of mineralized, boiling water, explosively flashing to steam, breaking up the rock, depositing minerals in fractures and cavities (1/2)

$Outcrop photo of brecciated basalt, with dark pieces of vesicular basalt separated by lighter interstices, fracture fills, and mineralized cavities. The photo is of a vertical profile of the top of a basalt flow. There is a cell phpne for scale.$ $Outcrop photo of brecciated basalt, with dark pieces of vesicular basalt separated by lighter interstices, fracture fills, and mineralized cavities. The photo is looking down onto the top of a basalt flow. There is a boot for scale.$ $Outcrop photo of brecciated basalt, with dark pieces of vesicular basalt separated by lighter interstices, fracture fills, and mineralized cavities. The photo is looking down onto the top of a basalt flow. There is a boot for scale.$ $Outcrop photo of brecciated basalt, with dark pieces of vesicular basalt separated by lighter interstices, fracture fills, and mineralized cavities. The photo is looking down onto the top of a basalt flow. There is a boot for scale.$

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Tim Demko @timdemko.xyz · 25/08/2025

Joe's post reminded me of this piece of artwork given to me me by the artist, William "Rockman" Gooder from Duluth, MN. William would come to my office with collections of stones he chose from the gravel beaches of Lake Superior for his artwork, asking me to to tell him the story of each one. (1/2)

Framed artwork made of multicolored rocks and tan sand from the shores of Lake Superior, MN. Artwork by William Gooder: https://www.williamgooder.com/

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Tim Demko @timdemko.xyz · 30/07/2025

MEGAQUAKE! 8.7 off of Kamchatka. Here is the response on my RaspberryShake 4D in Phoenix, AZ USA #earthquake #RaspberryShake

Seismograph showing response from a magnitude 8.7 mega earthquake off of the southern Kamchatka peninsulaon a RaspberryShake 4D seismometer in Phoenix, AZ USA. The figure has three graphical sections: 1) a time series of the amplitude of vibrations in meters/second over about 50 minutes, 2) a time series of the frequency response over the same time interval, and 3) an amplitude versus frequency diagram showing a peak frequency of about 0.25 Hertz

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Tim Demko @timdemko.xyz · 15/06/2025

Here are some highlights from deep red Surprise, Arizona. There were several hundred folks lining about 4 blocks, both sides of the highway. Well behaved, except for a few drive-by hecklers. The group was very diverse, happy, and fired up! Kudos to the No Kings organizers!

Protest sign that reads "Gestapo 1933, ICE 2025"

Protest in Suprise, AZ; people holding protest signs: "Nobody is illegal on stolen land", "rebellion against tyrants is obedience to God - Benjamin Franklin", "Respect the Constitution, uphold the rule of law", "One wing for justice, one wing for judgement"

Protest sign: "Does this ass (photo of Trump) make my country look small?"

Protest sign: painting of the Statue of Liberty covering her eyes

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Tim Demko @timdemko.xyz · 15/05/2025

Thought of this photo right away: left it all in the field! Clockwise from left: Brian Bodenbender, me, Mark Uhen: Shell, WY, July 2004. We survived.

Three dirty, exhausted, and happy geologists, sleeping sacked out in camp chairs and on the ground.

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Tim Demko @timdemko.xyz · 06/05/2025

Artificial Intelligence when I was a kid:

See 'N Say talking learning toy, circa 1964. My dialect comes from this toy and Myron Cope (...on sports) sportscaster from KDKA TV in Pittsburgh. Yoy.

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Tim Demko @timdemko.xyz · 27/04/2025

Got an exclusive preview of the Auburn University Geo Explorer Lab, a 37 foot RV mobile learning lab under construction that will introduce students, teachers, and community partners to the breadth of geoscience approaches to science and social studies learning.

The Auburn University Geosciences Department "Geo Bus", or mobile Geo Explorer Lab. It will bring science and technology experiences to students, teachers, and other community members all across the State of Alabama. It is a converted 37 foot RV that will house educational science and technology equipment and learning stations.

The Auburn University Geosciences Department mobile Geo Explorer Lab

Microscopes and VR headsets in the Geo Explorer Lab

Topography learning lab that uses molding sand, 3D scanner, and LCD projector so that learners can understand elevation contours.

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Tim Demko @timdemko.xyz · 15/02/2025

What is the coolest shot in movies? #Filmsky

Final scene from the movie Planet of the Apes, when Taylor realizes that he is actually on future Earth, looking at the ruins of the Statue of Liberty.

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Tim Demko @timdemko.xyz · 19/01/2025

We did have a President who felt the same way: www.americanrhetoric.com/speeches/jim...

In a nation that was proud of hard work, strong families, close-knit communities, and our faith in God, too many of us now tend to worship self-indulgence and consumption. Human identity is no longer defined by what one does, but by what one owns. But we’ve discovered that owning things and consuming things does not satisfy our longing for meaning. We’ve learned that piling up material goods cannot fill the emptiness of lives which have no confidence or purpose. The symptoms of this crisis of the American spirit are all around us. For the first time in the history of our country a majority of our people believe that the next five years will be worse than the past five years. Two-thirds of our people do not even vote.

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Tim Demko @timdemko.xyz · 13/01/2025

< February 19 FTW > We were both kissed by a rose on the grey... This is fun, a timeline cleanse if you will. Who is your celebrity Birthday Twin, born on the same day as you? Reply with a pic or gif

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Tim Demko @timdemko.xyz · 09/01/2025

These are crater-fill sediments in the Oligo-Miocene Hopi Buttes Volcanic Field. Volcanic rocks and volcanoclastic sediments interfinger with Bidahochi Formation. This succession preserves interaction between extrusive and intrusive igneous activity and a pre-Grand Canyon fluvial-lacustrine system.⚒️

Google Maps street-view image of crater-fill sediments.

chunk of the Winslow 30' x 60' geologic map, Billingsley, G.H., Block, D., and Hiza Redsteer, M., 2013, Geologic map of the Winslow 30’ × 60’ quadrangle, Coconino and Navajo Counties, northern Arizona: U.S. Geological Survey Scientific Investigations Map 3247, pamphlet 25 p., 3 sheets, scale 1:50,000, and GIS data, https://pubs.usgs.gov/sim/3247/

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Tim Demko @timdemko.xyz · 07/01/2025

Saw this exposure of an extensional detachment fault today, capped by Quaternary sediments across an angular unconformity. Precambrian igneous rocks form the footwall, while Miocene volcanoclastics and basalt are in the hanging wall. The detachment is a fault zone, here expressed as 2 normal faults.

Wide-angle photo of an outcrop of an extentional detachment, expressed as two normal faults deforming Precambrian granite and Miocene volcanoclastics and basalt. This succession is overlain by Quaternary fluvial sediments across an angualr unconformity. The rocks and light red and gray, and there is blue sky and white streaky clouds in the background., as well as scrubby desert vegetation on the top of the outcrop.

Closer view photo of an outcrop of an extentional detachment, expressed as two normal faults deforming Precambrian granite and Miocene volcanoclastics and basalt. This succession is overlain by Quaternary fluvial sediments across an angualr unconformity. The rocks and light red and gray, and there is blue sky and white streaky clouds in the background., as well as scrubby desert vegetation on the top of the outcrop. There is a gold pencil on the outcrop for scale.

Interpreted closer view photo of an outcrop of an extensional detachment, expressed as two normal faults deforming Precambrian granite and Miocene volcanoclastics and basalt. This succession is overlain by Quaternary fluvial sediments across an angualr unconformity. The rocks and light red and gray, and there is blue sky and white streaky clouds in the background., as well as scrubby desert vegetation on the top of the outcrop. There is a gold pencil on the outcrop for scale. The unconformity is outlined with a red line, while the faults are outlined in black, the rock units are labeled and the sense of movement of the faults is shown with arrows.

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Tim Demko @timdemko.xyz · 14/12/2024

Some great geomorphic and sedimentologic features seen while out mapping igneous/metamorphic rocks: feeder channels to the apex of this alluvial fan incised, left behind a flight of boulder-levee-lined terraces. Boulders were stranded along the channel edges by debris flows coming down the drainage.

Photo of the apex of an alluvial fan, looking down from a hill above. The feeder channels of the fan have been incised, leaving boulder levee-lined flights of terraces. It is a desert landscape, with cholla and saguaro cacti and palo verde trees. The foothills of mountains are in the background.

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Tim Demko @timdemko.xyz · 14/12/2024

From a reply to a repost: didn't include because it doesn't have a scale. The contact here is much more complicated, but the big white crystals near the bottom of the pegmatite outcrop here are giant (1 m long) spodumene laths. You can spot other spodumene laths throughout the main pegmatite.

Outcrop photo of a light colored pegmatite intruded into darker schist. There is a smaller pegmatite body that offshoots the main body. There are large lath-like crystals of spodumene intergrown with quartz, feldspar, and muscovite.

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Tim Demko @timdemko.xyz · 14/12/2024

Here is another nearby outcrop that I didn't include because it doesn't have a scale. The contact is much more complicated, but the big white crystals near the bottom of the pegmatite outcrop here are giant (1 m long) spodumene laths. You can spot other spodumene laths throughout the main pegmatite.

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Tim Demko @timdemko.xyz · 14/12/2024

Nice example of an igneous intrusive contact between a light colored pegmatite and a darker schist in central Arizona USA. The contact is sharp and sinuous, and the pegmatite shows little evidence of a finer-crystalline chilled margin. The pegmatite has abundant spodumene, a lithium-bearing mineral.

Outcrop photo of a light colored pegmatite intruded into darker schist. The contact is sinuous and sharp. There are some bunch grasses growing on the outcrop and a small scraggly tree at the top.

Photo of an outcrop of a the intrusive contact between a light colored pegmatite and darker schist. The contact is sharp and shows little alteration and the pegmatite shows little evidence of a finer crystalline chilled margin. There is a mechanical pencil for scale.

Photo of minerals in a pegmatite intrusion. There is very light gray quartz intergrown with white spodumene. There is a mechanical pencil for scale.

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Tim Demko @timdemko.xyz · 07/12/2024

Field work in the White Tank Mountains in central Arizona USA: great igneous relationships between screens or xenoliths of Proterozoic schist and a Cretaceous/Paleogene granite! There are also some younger pegmatite veins that cut both. This is also the lower plate of a metamorphic core complex.

Photo of an outcrop of light brownish red schist cut by lighter granitic dikes. Shadow of the photographer for scale in the lower left corner.

Photo of an outcrop of screen or large xenolith of light brownish red schist surrounded by a lighter granite and cut by lighter granitic dikes.

Photo of an outcrop of a light colored granitic dike cutting a darker gray schist. The foliation of the schist is vertical and cut at a right angle by the dike. The dike has two bands, an equigranular granite and coarsely crystalline pegmatite. There is a brass pen for scale.

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Tim Demko @timdemko.xyz · 05/12/2024

Found this impressive packrat midden in the Vulture Mountains of central Arizona USA. Packrats construct their middens by obsessively collecting vegetation debris and other objects within about 100 m of the midden site. They only get water from eating vegetation, so their urine is very concentrated

Photo of a packrat midden, a collection of sticks, cactus pads and spines, and other plant debris. The midden is stuated in the crevice and overhang of agray to light red rock outcrop. There is a clump of dark amberat (solidified packrat urine and feces) in the upper center of the midden, adhered to the rock.

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Tim Demko @timdemko.xyz · 04/12/2024

A nice igneous intrusive relationship between a dark reddish brown andesite breccia and a light red rhyolite porphyry with dark mafic inclusions (left). This outcrop is part of the Vulture Mountains (right) volcanic center in central Arizona USA. These units were emplaced in the Miocene, ~20 Mya.

Outcrop photo showing a dark reddish brown andesite breccia intruded by a light red rhyolite porphyry. The contact is jagged and irregular, and the porphyry contains some dark mafic xenoliths.

Photo of the Vulture Peak in the Vulture Mountains of central Arizona USA. These mountains consist of Miocene volcanic rocks and associated intrusions. There is desert vegetation in the foreground, including saguaro cacti and palm verde trees.

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Tim Demko @timdemko.xyz · 03/12/2024

"spoken-word-slam-poetry"...I knew someone would get the bit, eventually! Now, finally, you all know.

Screenshot from results of label scanner: "bluesky-elder" from Skywatch Blue/Anti-Alf Aktion, "he" from Pronouns Labeling System, "spoken-word-slam-poetry" from The Cave of Trophonius, "geology" from STEM Laberler, "sedimentology" from STEM Labeler, "stratigraphy" from STEM Labeler

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Tim Demko @timdemko.xyz · 23/11/2024

My pathological obsessions as exhibited by my presence on Google Scholar. Actually, not a bad summary of what I've done to date. Still think of these subjects, but I work on different things now. Couple of head-scratchers, though...Cloverly? Hmmmmm. Maybe that abstract got refs? scholargoggler.com

Word cloud of keywords from my publications on Google Scholar. The biggest font size words are "supercritical", "architecture", "morrison", "sequence", "stratigraphy", and "mudstone".

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Tim Demko @timdemko.xyz · 15/11/2024

Some awesome 1800−1755 m.y. pillow basalts (the elliptical to eye-shaped features) in the Yavapai Schist of central Arizona USA! These submarine extrusive rocks are in a succession of phyllite, banded iron formation, volcanogenic massive sulfide ore bodies, tuffs, rhyolite domes, and breccias. 🧪⚒️

Photo of an outcrop of gray and brown rock. There are elliptical features in the rock which are interpreted as ancient pillow structures formed by underwater eruption of basaltic lava. The photographer's boot is in the frame for scale.

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Tim Demko @timdemko.xyz · 10/11/2024

2 major earthquakes, magnitude 5.9 and 6.8, only about 1 hour apart, just off the southeast coast of Cuba, as recorded by my RaspberryShake 4D seismometer in Phoenix, Arizona USA. The precursor occurred at a depth of 14 km and the main quake at 23, associated with Oriente strike slip fault.

Seismograph plots of a magnitude 5.9 precursor earthquake along the southeast coast of Cuba. The figure shows a map indicating the the distance (3815 km) from the epicenter to the seismometer, a RaspberryShake 4D, near Phoenix, Arizona USA.

Seismograph plots of a magnitude earthquake along the southeast coast of Cuba. The figure shows a map indicating the distance (3812 km) from the epicenter to the seismometer, a RaspberryShake 4D, near Phoenix, Arizona USA. The event occurred about 1 hour after, and was only 3 km from the precursor event.

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Tim Demko @timdemko.xyz · 08/11/2024

I also love this little must-see side trip. The guacamole (recipe) is life-changing!

Two people, a woman and a man, are posing for a photo in front of a sign that reads "Republic of Slowjamastan www.slowjamastan.org". There is blue sky and a Mojave Desert landscape in the background. There are mountains in the far distance.

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Tim Demko @timdemko.xyz · 05/11/2024

At least we didn't have to suffer all that engine knocking. Totally worth it. Sob.

Bar graph of blood lead levels versus age in 2015. Those who were 35-52 in 2015 had, by far the highest levels. They are 44-61 years old in 2024.

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