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Dr. Amilcar Carrera-Cevallos

@acarrerac.bsky.social
2.4K followers 270 following 371 posts

Ecuador 🇪🇨🏳️‍🌈 Civil Engineer; MsC. Earthquake Engineering; PhD Earthquake Engineering. Earthquake Scientists.

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Reposted by Dr. Amilcar Carrera-Cevallos
Brandon Bishop @brandontbishop.bsky.social · 02/10/2026
Australian intraplate earthquake with the most interesting color scheme for seismograms I've seen in a while....
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Reposted by Dr. Amilcar Carrera-Cevallos
Dr. Judith Hubbard @judithgeology.bsky.social · 27/08/2026
eos.org/thelandslide...
eos.org
The 26 August 2026 catastrophic debris flow in Nepal and Tibet
Initial observations on the 26 August 2026 catastrophic debris flow in Nepal and Tibet, which has killed hundreds of people.
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Reposted by Dr. Amilcar Carrera-Cevallos
Jason "Jay" R. Patton @earthjay.bsky.social · 15/08/2026
#EarthquakeReport for M 6.9 #Gempa #Earthquake in #Sumatra #Indonesia Left-lateral (?) strike-slip earthquake mechanism Intermediate depth Intraplate earthquake within subducted India plate (?) Tectonic setting in 2023 report earthjay.com?p=11040 earthquake.usgs.gov/earthquakes/...
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Reposted by Dr. Amilcar Carrera-Cevallos
Dr. Judith Hubbard @judithgeology.bsky.social · 15/08/2026
⚒️ 🧪 A M7.7 earthquake just struck Flores, Indonesia. The USGS estimates that hundreds could have died, although the news currently reports far fewer. The earthquake seems to have occurred on a known “backthrust” that runs along the north coast of the island. Learn more:
earthquakeinsights.substack.com
M7.7 earthquake strikes Flores, Indonesia
Backthrusting along the Flores Thrust
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 15/08/2026
An M7.7 #earthquake struck Flores, #Indonesia. There have been at least 17 aftershocks since the earthquake, the largest of which, measuring M6.1, has been recorded so far. In fact, the earthquake triggered a tsunami; waves between 0.2 and 0.5 metres high were detected in various locations.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 15/08/2026
Preliminary finite fault model of the M7.7 #earthquake in #Indonesia (Aug 14, 2026). Coseismic slip concentrates in two main patches along the fault plane, reaching ~2.6 m near the epicenter.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 15/08/2026
Minor #Tsunami In #Indonesia amid massive 7.7 magnitude of earthquake.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 15/08/2026
Images of a local #tsunami wave hitting the northern coast of #Indonesia.
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Reposted by Dr. Amilcar Carrera-Cevallos
Jason "Jay" R. Patton @earthjay.bsky.social · 15/08/2026
#EarthquakeReport for M 7.7 #Gempa #Earthquake offshore of Timor #Indonesia @USGS_Quakes models suggest triggered landslides and induced liquefaction Hopefully few casualties Tectonic setting in 2019 report earthjay.com?p=7614 earthquake.usgs.gov/earthquakes/...
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 15/08/2026
#Indonesia #Earthquake
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 14/08/2026
PRELIMINARY!!!! An M7.7 #earthquake struck #Indonesia a few minutes ago. earthquake.usgs.gov/earthquakes/...
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Reposted by Dr. Amilcar Carrera-Cevallos
Henning @geohenning.bsky.social · 13/08/2026
A new video emerged which seems to show a surface rupture in Yatsushiro, Japan following the M6.8 earthquake in July! Exact location of the video would be 32°30'04.0"N 130°38'29.9"E. Absolutely wild. Only the second ever video of a surface rupture forming after the 2025 Myanmar video! ⚒️🧪 #geology
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 13/08/2026
🇨🇴 EVOLUTION OF AFTERSHOCKS FROM THE #COLOMBIAN #EARTHQUAKE Following the M7.4 mainshock (10 Aug, 12:34 UTC), the Colombian Geological Survey recorded 201 aftershocks up to this catalogue's cut-off (13 Aug, 21:42 UTC) — the first 81 hours of the sequence. 🧵
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Dr. Judith Hubbard @judithgeology.bsky.social · 13/08/2026
Impressive! I wonder how common these kinds of videos will become - we are also seeing a remarkable (and horrifying) influx of videos showing buildings shaking and then collapsing. (And of course, figuring out what's real and what is fake is an increasing problem.)
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Reposted by Dr. Amilcar Carrera-Cevallos
Dr. Judith Hubbard @judithgeology.bsky.social · 10/08/2026
⚒️ 🧪 A deadly M7.4 earthquake just struck Colombia, causing strong shaking and collapsing buildings. The death count - now at 69 - has been increasing with passing hours. We look at the tectonics responsible for this event. earthquakeinsights.substack.com/p/deadly-m74...
earthquakeinsights.substack.com
Deadly M7.4 earthquake strikes beneath Colombia
Deep strike-slip event within a subducting slab
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Reposted by Dr. Amilcar Carrera-Cevallos
Un geólogo en apuros @geologoenapuros.bsky.social · 10/08/2026
1/10 🧵 Hoy Colombia ha sufrido un terremoto de magnitud 7.4 con epicentro en San José del Palmar. Tras un evento así surge siempre la misma pregunta: ¿Por qué no se avisó?. Lo explicamos en un hilo surgido de vuestras preguntas. 👇
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Reposted by Dr. Amilcar Carrera-Cevallos
Henning @geohenning.bsky.social · 10/08/2026
First reports of at least 20 dead so far, following the powerful M7.4 #earthquake in Colombia today. ⚒️ #Geology www.rtve.es/noticias/202...
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Reposted by Dr. Amilcar Carrera-Cevallos
Dr. Wendy Bohon @drwendyrocks.bsky.social · 10/08/2026
Preliminary information about the M7.4 earthquake in Colombia
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Reposted by Dr. Amilcar Carrera-Cevallos
Brandon Bishop @brandontbishop.bsky.social · 10/08/2026
Today's 7.4 Mw earthquake in Colombia is the region's largest earthquake below 50 km depth in the instrumental record. The second largest, a 7.3 Mw earthquake around 300 km south of today's earthquake, was 70 km deeper and had a lower reported intensity as a result.
All earthquakes in the USGS catalog for Cauca region (~1 degree North to ~5 degrees North along Colombia's west coast) larger than a magnitude of 5.5 from January 1, 1900 to today. Today's earthquake is highlighted in cyan. All but three large earthquakes in this time interval occur within ~100 km of today's earthquake. Red line marks the subduction zone plate boundary where the Nazca plate subducts beneath South America.
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Reposted by Dr. Amilcar Carrera-Cevallos
Dr. Wendy Bohon @drwendyrocks.bsky.social · 10/08/2026
M 7.4 earthquake 5 km E of San José del Palmar, Colombia Luckily it’s fairly deep (107km) earthquake.usgs.gov/earthquakes/...
Map showing part of Columbia. The star shows the location of the earthquake and the colors showing levels of shaking.
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Reposted by Dr. Amilcar Carrera-Cevallos
HydrologyNL @hydrology.nl · 10/08/2026
M7.4 earthquake in Colombia
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Jason "Jay" R. Patton @earthjay.bsky.social · 10/08/2026
#EarthquajeReport for M 7.4 #Sismo #Terremoto #Earthquake en #Colimbia @USGS_Quakes models suggest high chance for casualties, infrastructure damage, triggered landslides, & in induced liquefaction Tectonic setting in '19 report earthjay.com?p=8361 earthquake.usgs.gov/earthquakes/...
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Reposted by Dr. Amilcar Carrera-Cevallos
Dr. Erik Klemetti Gonzalez @eruptions.site · 10/08/2026
Big earthquake in Colombia today. M7.4, relatively deep it seems (100 km) and to the west of the big cities. Still, likely damaging.
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Reposted by Dr. Amilcar Carrera-Cevallos
Henning @geohenning.bsky.social · 10/08/2026
USGS updated their PAGER to ORANGE. #Earthquake ⚒️🧪 earthquake.usgs.gov/earthquakes/...
USGS pager orange in estimated fatalities and economic loss
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 01/08/2026
An #earthquake of magnitude 4.7 struck Campi Flegrei, #Naples, at a depth of 3 km according to the INGV; the USGS places it at a depth of 5 km. According to Rai, it was the strongest earthquake in the area in the last 40 years, and there has been extensive structural damage as well as landslides.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 01/08/2026
Un #terremoto de M4.7 sacudió Campi Flegrei, #Nápoles a una profundidad de 3 km según INGV; el USGS lo coloca a 5 km de profundidad. Según la Rai ha sido el terremoto de mayor magnitud de los últimos 40 años en la zona y hay numerosos daños tanto estructurales como deslizamientos de tierra.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 28/07/2026
Thank you to @jackiefmogensen.bsky.social and @sciam.bsky.social for interviewing me about the earthquake that struck Japan, M6.8. www.scientificamerican.com/article/what...
scientificamerican.com
What caused the magnitude 6.8 earthquake in Japan?
This quake, which has caused damage to several roads and buildings, occurred along a strike-slip fault
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 28/07/2026
The earthquake in Kumamoto has clearly demonstrated its power and intensity. I received a video from the area where the epicentre of the tremor was located. #earthquake #terremoto #Japan #japon
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Reposted by Dr. Amilcar Carrera-Cevallos
The New York Times @nytimes.com · 28/07/2026
A 6.8 magnitude earthquake struck southwest Japan on Tuesday afternoon, causing injuries and fires near its epicenter, according to Japan’s state broadcaster. Get the latest updates. nyti.ms/44RIV2k
nyti.ms
Japan Earthquake Live Updates: 6.8-Magnitude Quake Strikes Kumamoto Prefecture
Fires and injuries were reported after the quake in Kumamoto Prefecture, according to Japan’s state broadcaster. A tsunami warning was lifted.
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Reposted by Dr. Amilcar Carrera-Cevallos
The New York Times @nytimes.com · 28/07/2026
A strong, 6.8-magnitude earthquake struck in Japan on Tuesday, according to the United States Geological Survey. Subsequent quakes have been reported in the same area.
nyti.ms
Map: 6.8-Magnitude Earthquake Shakes Japan
View the location of the quake’s epicenter and shake area.
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Reposted by Dr. Amilcar Carrera-Cevallos
The New York Times @nytimes.com · 28/07/2026
Breaking News: Rescuers raced to find people feared trapped in a partially collapsed mall after a 6.8-magnitude quake hit Kumamoto in southwest Japan. nyti.ms/4h2yhgj
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Jason "Jay" R. Patton @earthjay.bsky.social · 28/07/2026
#EarthquakeReport for M 6.8 #Earthquake in #Kumamoto #Japan Right-lateral (?) strike-slip earthquake mechanism @USGS_Quakes PAGER suggests lots of damage Regional tectonics in '16 report earthjay.com?p=3945 earthquake.usgs.gov/earthquakes/...
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Reposted by Dr. Amilcar Carrera-Cevallos
Jason "Jay" R. Patton @earthjay.bsky.social · 28/07/2026
#EarthquakeReport for M 6.8 #Earthquake in #Kumamoto #Japan @USGS_Quakes PAGER suggests lots of damage Potential for triggered landslides and induced liquefaction Regional tectonics in '16 report earthjay.com?p=3945 earthquake.usgs.gov/earthquakes/...
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Reposted by Dr. Amilcar Carrera-Cevallos
Mark Chadbourn @chadbourn.bsky.social · 28/07/2026
A 6.8 magnitude earthquake has hit Kumamoto prefecture, Japan. Several buildings and bridges have collapsed. The earthquake registered Shindo 7, the highest level on Japan's seismic intensity scale.
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NBC News @nbcnews.com · 28/07/2026
LATEST: Major 7.1 magnitude earthquake rocks southern Japan, injuring dozens.
nbcnews.com
Live updates: Multiple people trapped in a mall after earthquake strikes southern Japan
The preliminary magnitude of 7.1 quake was at the highest end of Japan’s seismic intensity scale.
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The Guardian @theguardian.com · 28/07/2026
Multiple people trapped inside shopping centre in Japan after earthquake – live updates
theguardian.com
Multiple people trapped inside shopping centre in Japan after earthquake – live updates
An ⁠earthquake ​with ⁠a ⁠preliminary magnitude ​of ‌7.1 ‌struck ‌the country’s Kumamoto prefecture Japan’s prime minister, Takaichi Sanae, has confirmed that a tsunami advisory was issue for Ariake Bay and Yatsushiro Sea after the earthquake hit the Kumamoto prefecture. She wrote on social media: At around 4:27 p.m. today, an earthquake with its epicenter in the Kumamoto region of Kumamoto Prefecture occurred, and strong shaking with a maximum seismic intensity of 7 was observed in Uki City and Makigawa Town in Kumamoto Prefecture. In connection with this earthquake, a tsunami advisory has been issued for Ariake Bay and Yatsushiro Sea, and tsunamis of about 1 meter are expected. Please refrain from approaching the coast. From me, to the relevant ministries and agencies - Urgently grasp the damage situation - Closely coordinate with local governments, and under the policy of prioritizing human life, the entire government will fully engage in emergency disaster response measures such as lifesaving and rescue for the affected people - Timely and accurate provision of information to the public regarding tsunamis and damage, etc. I have instructed these three points. To those in the areas where the shaking was strong, I would like to ask you to continue to be vigilant against the occurrence of earthquakes of the same magnitude. Continue reading...
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Dr. Judith Hubbard @judithgeology.bsky.social · 20/07/2026
⚒️ 🧪 A M5.5 earthquake struck central Peru today, killing at least 6. What made this event so damaging? earthquakeinsights.substack.com/p/deadly-m55...
earthquakeinsights.substack.com
Deadly M5.5 earthquake strikes central Peru
Shallow hypocenter + vulnerable construction = serious damage
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 12/07/2026
🧵 How Space Radar “Saw” the #Earthquake That Devastated #Venezuela I plot these maps using data from #NISAR (NASA-ISRO Synthetic Aperture Radar), combining three pre- and post-earthquake interferometric pairs following the seismic sequence of June 24, 2026, in northern Venezuela (M7.2 and M7.5):
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Dr. Judith Hubbard @judithgeology.bsky.social · 01/07/2026
⚒️ 🧪 One week has passed since the M7.5 earthquake in Venezuela. FUNVISIS has detected >600 aftershocks so far, concentrated in the east, near Caracas. New satellite imagery shows >3 meters of likely surface offset in the same area - perhaps explaining the aftershocks, and contributing to damage.
earthquakeinsights.substack.com
Aftershocks and satellite imaging of the Venezuela earthquake
Early results show >3 meters of near-surface offset near Caracas, with a zone of intense aftershocks
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 29/06/2026
El interferograma de Sentinel-1 muestra una deformación cosísmica de unos 30 cm provocada por el doblete sísmico de magnitud Mw 7,2–7,5 en #Venezuela.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 29/06/2026
Sentinel-1 interferogram shows ~30 cm of coseismic deformation from #Venezuela's Mw7.2–7.5 #earthquake doublet. The interferogram compares Sentinel-1 acquisitions before (18 June) and after (25 June) the earthquake, revealing the coseismic deformation field with millimetre-scale precision.
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Dr. Eric J. Fielding, PhD @ericjfielding.bsky.social · 28/06/2026
NASA-ISRO SAR (NISAR) satellite imaged Venezuela June 25. NISAR SAR interferometry (InSAR) enabled calculation of surface displacement. Displacements have red tones for east and blue tones for west, with white in middle near-zero over fault rupture. Fault ruptured far to east under ocean. #venezuela
Map of north-central Venezuela with NISAR line-of-sight displacement map shown in false color varying from red to white to blue. Red land moved east (towards satellite) and blue land moved west. InSAR only measures land, so ocean and lakes have no measurements. Background map from Google satellite natural-color images on land and bathymetry in ocean.
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Dr. Judith Hubbard @judithgeology.bsky.social · 29/06/2026
Join me at 2 PM EST live - I’ll be chatting with Shawn Willsey at Geology Explained about the Venezuela earthquake. Come with questions! www.youtube.com/watch?v=j3AF...
youtube.com
LIVESTREAM: Two Earthquake Scientists Explain the Venezuela Earthquake
YouTube video by Shawn Willsey: Geology Explained
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 29/06/2026
I share with you a navigable 3D scene of Catia La Mar, La Guaira, Venezuela, where the buildings with notorious damage from the double earthquake of June 24 are highlighted. Link: www.arcgis.com/home/webscen...
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Dr. Judith Hubbard @judithgeology.bsky.social · 28/06/2026
⚒️ 🧪 Should the Venezuela earthquake(s) be considered one event or two? We asked the USGS how they made their decision. Also: a look at their preliminary slip model. earthquakeinsights.substack.com/p/venezuela-...
earthquakeinsights.substack.com
Venezuela: One earthquake or two?
A look into the data as the USGS saw it
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 27/06/2026
The spatial distribution of intensities from the #earthquake in #Venezuela shows a marked E–W elongation that coincides with the geometry of the rupture obtained using the finite fault model.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 27/06/2026
La distribución espacial de intensidades del #terremoto de #Venezuela presenta una marcada elongación E–O que coincide con la geometría de la ruptura obtenida mediante el modelo de falla finita.
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 27/06/2026
Using the finite fault model provided by the USGS, I was able to plot it and its focal mechanism. This is a combined inversion of both earthquakes. The estimated rupture length for this segment is approximately 250 km, extending along the San Sebastián Fault. #Venezuela #earthquake
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 27/06/2026
Mediante el modelo de falla finita dado por el USGS, pude plotearlo más su mecanismo focal. Esto es una inversión combinada de ambos terremotos. La ruptura estimada para este segmento es de 250 km aprox, situándose a lo largo de la Falla de San Sebastián. #Venezuela #terremoto
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Dr. Amilcar Carrera-Cevallos @acarrerac.bsky.social · 26/06/2026
Los invito a leer este articulo que acabo de publicar en Substack sobre un preliminar de por qué fallaron las edificaciones en Venezuela. open.substack.com/pub/amilcarc...
open.substack.com
¿Por qué fallaron las edificaciones en el doblete sísmico en Venezuela?
¿Mal diseño o edificaciones antiguas?
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