Robin Lacassin
@rlacassin.bsky.social
Institut de Physique du Globe de Paris (IPGP - CNRS). Geology, tectonics, earthquakes, hazard epistemology & com. ⚒️ 🧪
Also: @[email protected]
https://www.ipgp.fr/~lacassin/RL-TectoniqueIPGP
https://tectoldies.mystrikingly.com/
Also: @[email protected]
https://www.ipgp.fr/~lacassin/RL-TectoniqueIPGP
https://tectoldies.mystrikingly.com/
Pinned
Robin Lacassin
@rlacassin.bsky.social
· Feb 27
In support of our US scientific colleagues, and to defend #science as a common good, everywhere, actions are currently being organized in France. #standupforscience2025 ⚒️ 🧪
To be informed, follow:
@standupforscifr.bsky.social
@sufs-paris-rp.bsky.social (Paris and IDF)
standupforscience.fr
To be informed, follow:
@standupforscifr.bsky.social
@sufs-paris-rp.bsky.social (Paris and IDF)
standupforscience.fr
Reposted by Robin Lacassin
Never forget: At breakneck speed we are leaving the stable Holocene climate in which human society developed and thrived. Weather extremes are outside historical experience. Sea-level rise is accelerating. Dangerous tipping points are ahead.
Graph: ed-hawkins.github.io/climate-visu...
Graph: ed-hawkins.github.io/climate-visu...
November 13, 2025 at 11:52 AM
Never forget: At breakneck speed we are leaving the stable Holocene climate in which human society developed and thrived. Weather extremes are outside historical experience. Sea-level rise is accelerating. Dangerous tipping points are ahead.
Graph: ed-hawkins.github.io/climate-visu...
Graph: ed-hawkins.github.io/climate-visu...
Excellent editorial 👇 about #human vs #AI generated writing.
"…(human) writing is not only about reporting results; it also provides a tool to uncover new thoughts and ideas."
⚒️ 🧪
www.nature.com/articles/s44...
"…(human) writing is not only about reporting results; it also provides a tool to uncover new thoughts and ideas."
⚒️ 🧪
www.nature.com/articles/s44...
Writing is thinking - Nature Reviews Bioengineering
On the value of human-generated scientific writing in the age of large-language models.
www.nature.com
November 13, 2025 at 1:56 PM
Excellent editorial 👇 about #human vs #AI generated writing.
"…(human) writing is not only about reporting results; it also provides a tool to uncover new thoughts and ideas."
⚒️ 🧪
www.nature.com/articles/s44...
"…(human) writing is not only about reporting results; it also provides a tool to uncover new thoughts and ideas."
⚒️ 🧪
www.nature.com/articles/s44...
Reposted by Robin Lacassin
World still on track for catastrophic 2.6C temperature rise, report finds
World still on track for catastrophic 2.6C temperature rise, report finds
Fossil fuel emissions have hit a record high while many nations have done too little to avert deadly global heating
The world is still on track for a catastrophic 2.6C increase in temperature as countries have not made sufficiently strong climate pledges, while emissions from fossil fuels have hit a record high, two major reports have found.
Despite their promises, governments’ new emission-cutting plans submitted for the Cop30 climate talks taking place in Brazil have done little to avert dangerous global heating for the fourth consecutive year, according to the Climate Action Tracker update. Continue reading...
www.theguardian.com
November 13, 2025 at 12:07 AM
World still on track for catastrophic 2.6C temperature rise, report finds
An Op-ed in "Le Monde" by a group of doctoral students in Earth and climate sciences denounces the hypocrisy of international policies that claim to lead the ecological transition but "undermine, decision after decision, the means to achieve it". ⚒️ 🧪
in FR: www.lemonde.fr/idees/articl...
in FR: www.lemonde.fr/idees/articl...
COP30 : « A l’heure où les scénarios climatiques s’aggravent, les incohérences de la France et de l’UE ne sont plus tenables »
TRIBUNE. Dans une tribune au « Monde », un collectif de doctorants et de doctorantes en sciences de la Terre et du climat dénonce l’hypocrisie de politiques internationales qui prétendent mener la tra...
www.lemonde.fr
November 12, 2025 at 7:15 PM
An Op-ed in "Le Monde" by a group of doctoral students in Earth and climate sciences denounces the hypocrisy of international policies that claim to lead the ecological transition but "undermine, decision after decision, the means to achieve it". ⚒️ 🧪
in FR: www.lemonde.fr/idees/articl...
in FR: www.lemonde.fr/idees/articl...
Reposted by Robin Lacassin
NOAA cut funding to the Alaska Earthquake Center, directed by my friend Mike West. As a result, seismic monitoring by nine stations in Alaska tracking tsunami-causing earthquakes will go offline by the end of the month. This endangers people in Alaska, Hawaiʻi, and other parts of the Pacific.
This lab is key for tracking deadly waves. Its sensors are about to go offline.
After NOAA cut funding to the lab that’s been monitoring seismic activity for more than 25 years, nine stations tracking tsunami-causing earthquakes for the agency will go offline by the end of the mo...
www.washingtonpost.com
November 11, 2025 at 7:24 PM
NOAA cut funding to the Alaska Earthquake Center, directed by my friend Mike West. As a result, seismic monitoring by nine stations in Alaska tracking tsunami-causing earthquakes will go offline by the end of the month. This endangers people in Alaska, Hawaiʻi, and other parts of the Pacific.
Reposted by Robin Lacassin
The underwater seismometer network is so great, as evidenced from yesterday's EQ off-Tohoku.
Reposting unofficial visualization by x.com/kotoho76/sta...
Reposting unofficial visualization by x.com/kotoho76/sta...
November 10, 2025 at 6:56 AM
The underwater seismometer network is so great, as evidenced from yesterday's EQ off-Tohoku.
Reposting unofficial visualization by x.com/kotoho76/sta...
Reposting unofficial visualization by x.com/kotoho76/sta...
Reposted by Robin Lacassin
⚒️ 🧪
A M6.8 earthquake struck offshore Japan today - another large earthquake from the subduction zone that produced two recent great earthquakes. The earthquake was preceded by a "cascade up": foreshocks progressively increasing in maximum magnitude.
What do we know? What might happen next?
A M6.8 earthquake struck offshore Japan today - another large earthquake from the subduction zone that produced two recent great earthquakes. The earthquake was preceded by a "cascade up": foreshocks progressively increasing in maximum magnitude.
What do we know? What might happen next?
M6.8 earthquake offshore Japan preceded by upward cascade of foreshocks
What do we know about seismic hazard in the Japan-Kuril subduction zone?
earthquakeinsights.substack.com
November 9, 2025 at 6:41 PM
⚒️ 🧪
A M6.8 earthquake struck offshore Japan today - another large earthquake from the subduction zone that produced two recent great earthquakes. The earthquake was preceded by a "cascade up": foreshocks progressively increasing in maximum magnitude.
What do we know? What might happen next?
A M6.8 earthquake struck offshore Japan today - another large earthquake from the subduction zone that produced two recent great earthquakes. The earthquake was preceded by a "cascade up": foreshocks progressively increasing in maximum magnitude.
What do we know? What might happen next?
Reposted by Robin Lacassin
📰 Dans @lemonde.fr, notre collègue Harsha S. Bhat (laboratoire de #géologie ENS) explique comment l'étude du tremblement de terre en Birmanie a permis d'affiner les modèles sismiques.
www.lemonde.fr/sciences/art...
www.lemonde.fr/sciences/art...
Le tremblement de terre en Birmanie en mars a permis d’affiner les modèles des scientifiques
En plus d’être particulièrement étendu, ce séisme a présenté un front en « supercisaillement », lié à une vitesse de rupture très élevée. Dans « Science », une édition spéciale présente une série d’ar...
www.lemonde.fr
November 6, 2025 at 2:11 PM
📰 Dans @lemonde.fr, notre collègue Harsha S. Bhat (laboratoire de #géologie ENS) explique comment l'étude du tremblement de terre en Birmanie a permis d'affiner les modèles sismiques.
www.lemonde.fr/sciences/art...
www.lemonde.fr/sciences/art...
Reposted by Robin Lacassin
NEW: Hurricane Melissa was such a monstrous tempest that it was literally shaking the Earth as far away as Florida, where seismometers picked up its stormquakes.
Here’s how seismometers can also shine a light on hurricanes long gone.
Me @sciam.bsky.social www.scientificamerican.com/article/seis...
Here’s how seismometers can also shine a light on hurricanes long gone.
Me @sciam.bsky.social www.scientificamerican.com/article/seis...
Hurricane Melissa Literally Made the Earth Shake Hundreds of Miles Away
Seismometers picked up the ferocious winds and waves of Hurricane Melissa, showing how the tools can be used to better understand storms today and those from the past
www.scientificamerican.com
October 30, 2025 at 5:28 PM
NEW: Hurricane Melissa was such a monstrous tempest that it was literally shaking the Earth as far away as Florida, where seismometers picked up its stormquakes.
Here’s how seismometers can also shine a light on hurricanes long gone.
Me @sciam.bsky.social www.scientificamerican.com/article/seis...
Here’s how seismometers can also shine a light on hurricanes long gone.
Me @sciam.bsky.social www.scientificamerican.com/article/seis...
This is a fake image, probably AI generated. Be careful. Don’t repost.
Very sad to see misinformation so frequently after disasters.
Very sad to see misinformation so frequently after disasters.
October 29, 2025 at 4:31 PM
This is a fake image, probably AI generated. Be careful. Don’t repost.
Very sad to see misinformation so frequently after disasters.
Very sad to see misinformation so frequently after disasters.
Reposted by Robin Lacassin
Remember when social media was a useful tool for assessing damage post-disaster, instead of having to fish through fake photos made with AI garbage?
That was nice.
That was nice.
Black River hospital Jamaica #hurricane #melissa 🇯🇲
October 29, 2025 at 3:45 PM
Remember when social media was a useful tool for assessing damage post-disaster, instead of having to fish through fake photos made with AI garbage?
That was nice.
That was nice.
Reposted by Robin Lacassin
Update: Hurricane Melissa has made landfall in southwestern Jamaica — and has tied the all-time record for strongest Atlantic basin hurricane landfall.
Hurricane Melissa will be a generational-scale climate disaster and will require an international response to help Jamaicans recover.
Hurricane Melissa will be a generational-scale climate disaster and will require an international response to help Jamaicans recover.
October 28, 2025 at 5:09 PM
Update: Hurricane Melissa has made landfall in southwestern Jamaica — and has tied the all-time record for strongest Atlantic basin hurricane landfall.
Hurricane Melissa will be a generational-scale climate disaster and will require an international response to help Jamaicans recover.
Hurricane Melissa will be a generational-scale climate disaster and will require an international response to help Jamaicans recover.
Reposted by Robin Lacassin
#Melissa vient de toucher terre avec une pression centrale de 892 hPa à égalité avec le cyclone historique Labor Day de 1935.
C’est donc un record absolu pour le bassin Atlantique au moment de l’atterrissage (landfall)
1/2
C’est donc un record absolu pour le bassin Atlantique au moment de l’atterrissage (landfall)
1/2
October 28, 2025 at 2:33 PM
#Melissa vient de toucher terre avec une pression centrale de 892 hPa à égalité avec le cyclone historique Labor Day de 1935.
C’est donc un record absolu pour le bassin Atlantique au moment de l’atterrissage (landfall)
1/2
C’est donc un record absolu pour le bassin Atlantique au moment de l’atterrissage (landfall)
1/2
Disaster underway in #Jamaica.
#Melissa #hurricane making landfall along south-west coast of the island, with extremely low central pressure, and winds over 280 km/h. Massive rainfall predicted. Protect yourself, keep safe.
Source of data: www.tropicaltidbits.com/storminfo/
#Melissa #hurricane making landfall along south-west coast of the island, with extremely low central pressure, and winds over 280 km/h. Massive rainfall predicted. Protect yourself, keep safe.
Source of data: www.tropicaltidbits.com/storminfo/
October 28, 2025 at 2:59 PM
Disaster underway in #Jamaica.
#Melissa #hurricane making landfall along south-west coast of the island, with extremely low central pressure, and winds over 280 km/h. Massive rainfall predicted. Protect yourself, keep safe.
Source of data: www.tropicaltidbits.com/storminfo/
#Melissa #hurricane making landfall along south-west coast of the island, with extremely low central pressure, and winds over 280 km/h. Massive rainfall predicted. Protect yourself, keep safe.
Source of data: www.tropicaltidbits.com/storminfo/
Reposted by Robin Lacassin
Hurricane #Melissa strengthened to a powerful Category 5 on Monday, with destuctive winds and major winds expected to intensify in Jamaica.
Expected to make landfall on Tuesday, Melissa is set to be the strongest hurricane in recent history to directly hit the island.
Expected to make landfall on Tuesday, Melissa is set to be the strongest hurricane in recent history to directly hit the island.
October 28, 2025 at 10:01 AM
Hurricane #Melissa strengthened to a powerful Category 5 on Monday, with destuctive winds and major winds expected to intensify in Jamaica.
Expected to make landfall on Tuesday, Melissa is set to be the strongest hurricane in recent history to directly hit the island.
Expected to make landfall on Tuesday, Melissa is set to be the strongest hurricane in recent history to directly hit the island.
Reposted by Robin Lacassin
From a crewmember on yesterday's Teal 74 mission into now-Category 5 Hurricane #Melissa. As clear of an eye as you will see in the Atlantic basin.
October 27, 2025 at 4:11 PM
From a crewmember on yesterday's Teal 74 mission into now-Category 5 Hurricane #Melissa. As clear of an eye as you will see in the Atlantic basin.
Reposted by Robin Lacassin
Melissa now up to 175mph sustained winds (150kt), with a central pressure of 906mb.
That's among the 10 or 12 strongest hurricanes ever measured in the Atlantic basin, back to 1851. Regardless of whether they made landfall.
Melissa is likely to make landfall in Jamaica at near-peak strength.
That's among the 10 or 12 strongest hurricanes ever measured in the Atlantic basin, back to 1851. Regardless of whether they made landfall.
Melissa is likely to make landfall in Jamaica at near-peak strength.
Atlantic Hurricane Melissa Intermediate Advisory Number 25a
...CATEGORY 5 MELISSA MOVING SLOWLY WEST-NORTHWESTWARD AND EXPECTED TO TURN NORTHWARD LATER TODAY... ...CATASTROPHIC AND LIFE-THREATENING WINDS, FLOODING, AND STORM SURGE EXPECTED ON JAMAICA TONIGHT AND EA...
Additional Details Here.
...CATEGORY 5 MELISSA MOVING SLOWLY WEST-NORTHWESTWARD AND EXPECTED TO TURN NORTHWARD LATER TODAY... ...CATASTROPHIC AND LIFE-THREATENING WINDS, FLOODING, AND STORM SURGE EXPECTED ON JAMAICA TONIGHT AND EA...
Additional Details Here.
October 27, 2025 at 5:44 PM
Melissa now up to 175mph sustained winds (150kt), with a central pressure of 906mb.
That's among the 10 or 12 strongest hurricanes ever measured in the Atlantic basin, back to 1851. Regardless of whether they made landfall.
Melissa is likely to make landfall in Jamaica at near-peak strength.
That's among the 10 or 12 strongest hurricanes ever measured in the Atlantic basin, back to 1851. Regardless of whether they made landfall.
Melissa is likely to make landfall in Jamaica at near-peak strength.
Reposted by Robin Lacassin
The monster eye at the center of a still strengthening Hurricane Melissa.
October 27, 2025 at 4:54 PM
The monster eye at the center of a still strengthening Hurricane Melissa.
A Mw 6.5 #earthquake offshore #Guadeloupe island. Epicenter relatively close to trench. Mechanism is normal faulting with fault plane parallel to trench strike.
Given its depth (~13km), location, mechanism, I suspect it happened into the subducting oceanic crust beneath the accretionary prism. ⚒️
Given its depth (~13km), location, mechanism, I suspect it happened into the subducting oceanic crust beneath the accretionary prism. ⚒️
Mw=6.5, LEEWARD ISLANDS (Depth: 13 km), 2025/10/27 12:38:40 UTC - Full details here: http://geoscope.ipgp.fr/scripts/seismes/fiche.php?seis=us6000rjq8
October 27, 2025 at 2:17 PM
A Mw 6.5 #earthquake offshore #Guadeloupe island. Epicenter relatively close to trench. Mechanism is normal faulting with fault plane parallel to trench strike.
Given its depth (~13km), location, mechanism, I suspect it happened into the subducting oceanic crust beneath the accretionary prism. ⚒️
Given its depth (~13km), location, mechanism, I suspect it happened into the subducting oceanic crust beneath the accretionary prism. ⚒️
Reposted by Robin Lacassin
October 27, 2025 at 11:54 AM
Reposted by Robin Lacassin
A remarkable, and ominous, satellite snapshot this evening of Hurricane #Melissa as it continues to move very slowly westward just south of #Jamaica. The storm will likely further strengthen into a Category 5 storm before turning northward & making landfall in Jamaica on Tue.
October 27, 2025 at 12:56 AM
Reposted by Robin Lacassin
This evening's update from the U.S. National Hurricane Center on #Melissa is ominous, and explicitly mentions: "catastrophic and life-threatening flash flooding...extensive infrastructural damage...and potentially prolonged isolation of communities" in both Jamaica & Haiti.
October 25, 2025 at 9:27 PM
This evening's update from the U.S. National Hurricane Center on #Melissa is ominous, and explicitly mentions: "catastrophic and life-threatening flash flooding...extensive infrastructural damage...and potentially prolonged isolation of communities" in both Jamaica & Haiti.
Reposted by Robin Lacassin
📢 Alerte : Melissa en approche de la Jamaïque
L'ouragan s’intensifie fortement est actuellement en catégorie 4: la pression mesurée lors du dernier passage d’un avion de reconnaissance s’établit à 939,9 hPa à 19 h19 TU (en forte baisse après 953 hPa à 15 hTU).
L'ouragan s’intensifie fortement est actuellement en catégorie 4: la pression mesurée lors du dernier passage d’un avion de reconnaissance s’établit à 939,9 hPa à 19 h19 TU (en forte baisse après 953 hPa à 15 hTU).
October 26, 2025 at 9:10 PM
📢 Alerte : Melissa en approche de la Jamaïque
L'ouragan s’intensifie fortement est actuellement en catégorie 4: la pression mesurée lors du dernier passage d’un avion de reconnaissance s’établit à 939,9 hPa à 19 h19 TU (en forte baisse après 953 hPa à 15 hTU).
L'ouragan s’intensifie fortement est actuellement en catégorie 4: la pression mesurée lors du dernier passage d’un avion de reconnaissance s’établit à 939,9 hPa à 19 h19 TU (en forte baisse après 953 hPa à 15 hTU).
October 26, 2025 at 9:11 PM