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Alan Kafka @alankafka.bsky.social · 10h

Magnitude 4.8 earthquake yesterday in Northeast India, recorded by our seismograph in Assam.

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Alan Kafka @alankafka.bsky.social · 11/10/2026

Panama earthquake recorded across New England.

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Alan Kafka @alankafka.bsky.social · 10/10/2026

When I did this for my PhD thesis (long ago, in a galaxy far away...), I couldn't figure out what's going on in the area around Panama. It still looks complicated to me...

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Alan Kafka @alankafka.bsky.social · 09/10/2026

Today's magnitude 7.7 earthquake in Panama, recorded at Westport Astronomical Society in Westport, CT.

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Alan Kafka @alankafka.bsky.social · 30/09/2026

September 2026 "Nor’Easter" storm recorded by Raspberry Shake seismograph (@raspishake.bsky.social) in Coastal Maine.

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Alan Kafka @alankafka.bsky.social · 29/09/2026

Three earthquakes yesterday, off the coast of Vancouver Island, Canada - recorded at Westport Astronomical Society. Magnitudes 5.4, 5.2, and 4.9.

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Alan Kafka @alankafka.bsky.social · 28/09/2026

Infrasound generated by "Nor’Easter" recorded by "Raspberry Boom" infrasound sensor at Blue Hill Observatory and Science Center (@bhobservatory.bsky.social). And comparison with Blue Hill wind speed.

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Alan Kafka @alankafka.bsky.social · 20/09/2026

Magnitude 4.8 earthquake in Bhutan today, recorded by our seismograph in Assam, Northeast India.

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Alan Kafka @alankafka.bsky.social · 17/09/2026

This is the last of my currently scheduled lectures: Elkins Public Library, Canterbury, NH - Sept 24, 2026 at 6 PM. But let me know if you have any suggestions for other venues where people might want to hear me tell my story about the mystery of earthquakes in the Eastern US

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Alan Kafka @alankafka.bsky.social · 06/09/2026

Join me for a conversation on our seismic monitoring at Blue Hill Observatory, plus reflection on the mystery of why earthquakes occur in New England. bluehill.org/the-observat...

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Alan Kafka @alankafka.bsky.social · 06/09/2026

The glacial collapse landslide that triggered the catastrophic flooding in Nepal was so big that it was recorded on seismographs across the Northeastern US.

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Alan Kafka @alankafka.bsky.social · 02/09/2026

I was surprised to see how well our @raspishake.bsky.social in Assam, India (and other RSs in the region) recorded the glacial collapse landslide that triggered the catastrophic flooding in Nepal.

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Alan Kafka @alankafka.bsky.social · 23/08/2026

Magnitude 5.8 earthquake today, recorded by our seismograph in Assam, Northeast India.

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Alan Kafka @alankafka.bsky.social · 18/08/2026

Magnitude 5.7 earthquake today, off the coast of Mexico.

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Alan Kafka @alankafka.bsky.social · 12/08/2026

This is amazing! Thanks raspberryshake.org for making this happen!

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Alan Kafka @alankafka.bsky.social · 10/08/2026

Today's earthquake in Colombia, recorded across New England at Raspberry Shake stations.

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Alan Kafka @alankafka.bsky.social · 08/08/2026

Earthquake in Alaska today, recorded by new Raspberry Shake citizen seismograph we just installed in Maine (S615F). Hoping to expand RS network in northern New England.

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Alan Kafka @alankafka.bsky.social · 02/08/2026

Magnitude 5.6 earthquake today, off the coast of Vancouver, Canada - recorded at Westport Astronomical Society, and across New England.

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Alan Kafka @alankafka.bsky.social · 28/07/2026

In addition to today's large earthquake in Japan (6.8, yellow trace at 08:00), I see at least 2 other earthquakes here! China-5.8 (Yellow, 04:00) Mexico-5.9 (Blue, 05:00)

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Alan Kafka @alankafka.bsky.social · 22/07/2026

Very impressive how well Raspberry Shake low-cost citizen seismographs record strong earthquakes at quiet stations.

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Alan Kafka @alankafka.bsky.social · 18/07/2026

Magnitude 7.3 earthquake off coast of Mexico, recorded at Westport Astronomical Observatory

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Alan Kafka @alankafka.bsky.social · 18/07/2026

Magnitude 7.3 earthquake today off coast of Mexico, recorded across New England

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Alan Kafka @alankafka.bsky.social · 15/07/2026

Today's "Alan get a life" seismogram 🙂 Weston Observatory today: Ripping up the old asphalt driveway to replace it with new asphalt.

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Alan Kafka @alankafka.bsky.social · 12/07/2026

I'll have the Sandwich Plate and a Raspberry Shake 🙂

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Alan Kafka @alankafka.bsky.social · 12/07/2026

Yes, there really is a "Sandwich Plate" 🙂 Magnitude 6.4 earthquake - South Sandwich Islands (USGS "Green alert" for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.)

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Alan Kafka @alankafka.bsky.social · 01/07/2026

The 1929 "Grand Banks" earthquake and tsunami.

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Alan Kafka @alankafka.bsky.social · 01/07/2026

Yes, if an Atlantic Ocean earthquake is big enough, it can trigger a significant East Coast tsunami. This M4.2 earthquake (6/30/26) was too small to be of concern for tsunami hazards, but it was near a 1929 M7.2 earthquake south of Newfoundland that triggered a significant tsunami.

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Alan Kafka @alankafka.bsky.social · 27/06/2026

The powerful, destructive earthquake in Venezuela was well-recorded across New England with Raspberry Shake low-cost citizen seismographs. The situation remains very bad there 😢 😢 😢

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Alan Kafka @alankafka.bsky.social · 25/06/2026

Overwhelming for me to think about this tragic earthquake within the context of what sense I could make of earthquakes in this region back in 1980. This graphic shows results of my PhD thesis within the framework of the (very new at the time) theory of plate tectonics.

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Alan Kafka @alankafka.bsky.social · 25/06/2026

Powerful, destructive earthquake in Venezuela 😢😢 Recorded across New England with Raspberry Shake low-cost citizen seismographs.

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Alan Kafka @alankafka.bsky.social · 22/06/2026

Weston Observatory/Boston College has been monitoring earthquakes in New England since the 1930s... en.wikipedia.org/wiki/Weston_...

en.wikipedia.org

Weston Observatory (Boston College) - Wikipedia

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Alan Kafka @alankafka.bsky.social · 22/06/2026

Could have, but... The New England Seismic Network and BC Raspberry Shake networks, are maintatined by two BC faculty, me (Alan Kafka), and John Ebel, now both retired and still working 24/7/365 to maintain the stations we have going...

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Alan Kafka @alankafka.bsky.social · 22/06/2026

The nearest seismograph to Boston Stadium that I could find is a Raspberry Shake ~4 miles away. Here is a BC-BU hockey game recorded by an RS in BC's Conte Forum, but not seen at BC Library, just 0.2 miles away. 4 miles is quite far for recording seismic waves from sports events.

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Alan Kafka @alankafka.bsky.social · 22/06/2026

Post The 2026 World Cup win over Australia was well recorded at the Seattle Stadium. Why then don't we have similar seismic recordings (like the one here for the BC-BU "Battle of Comm Ave") for the World Cup events at Boston Stadium in Foxboro, MA? Explanation in 1st comment.

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Alan Kafka @alankafka.bsky.social · 22/06/2026

Seismographs located right at Seattle Stadium record World Cup event. facebook.com/share/p/1DN7...

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Alan Kafka @alankafka.bsky.social · 18/06/2026

Magnitude 6.6 earthquake: Mid-Atlantic Ridge. Recorded across New England with @raspishake.bsky.social low-cost citizen seismographs.

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Alan Kafka @alankafka.bsky.social · 11/06/2026

Magnitude 6.1 earthquake off the coast of Cuba, recorded across New England with @raspishake.bsky.social low-cost citizen seismographs.

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Alan Kafka @alankafka.bsky.social · 09/06/2026

Magnitude 6.1 earthquake off the coast of Cuba, recorded in New England at Westport Astronomical Society (@westportastro.bsky.social).

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Alan Kafka @alankafka.bsky.social · 08/06/2026

Major earthquake in Philippines, recorded in New England at Westport Astronomical Society.

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Alan Kafka @alankafka.bsky.social · 03/06/2026

Magnitude 5.7 earthquake today off the coast of Oregon/Northern California today, recorded at Westport Astronomical Society in New England.

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Alan Kafka @alankafka.bsky.social · 02/06/2026

Magnitude 6.2 earthquake in Italy yesterday, recorded by @raspishake.bsky.social seismographs in New England.

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Alan Kafka @alankafka.bsky.social · 01/06/2026

Meteorites and earthquakes and storms, oh my! The Earth has its own agenda. Humans learn to work around it... Numbers show the order in which our seismic stations recorded the meteor. NASA location is where NASA says the meteorite landed.

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Alan Kafka @alankafka.bsky.social · 31/05/2026

Yesterday's eastern MA meteor: Readings at some closer stations yield a location closer to the location posted by NASA. (Don't know why the nearer stations, like RF082 at Blue Hill Observatory, are not as strong as the farther away stations.)

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