The epicenter of today's M7.4 earthquake (see previous post) is in the area of the northern limit of the 2011 M9.1 rupture and aftershock zone
earthquake.usgs.gov/earthquakes/...

Today's #earthquake M7.4, Off east coast of Honshu, #Japan (red) in relation to the 2011 M 9.1 Great Tohoku Earthquake (blue)
earthquake.usgs.gov/earthquakes/...

Earthquake source parameters

Mw=7.5, OFF EAST COAST OF HONSHU, JAPAN (Depth: 27 km), 2026/04/20 07:53:00 UTC - Full details here: geoscope.ipgp.fr/scripts/seismes/fiche.ph...

Likely subduction zone, interplate thrust fault rupture

www.data.jma.go.jp/multi/quake/...

M7 #earthquake Off East Coast of Honshu, Japan
earthquake.usgs.gov/earthquakes/...

publicationsonline.carnegiescience.edu/publications...

Images from the paper “Relative location of seismic events using broadband frequency-wavenumber analysis: Application to the North Korean Nuclear Test Site” by Steven J. Gibbons in RAS Techniques and Instruments (2026) https://doi.org/10.1093/rasti/rzag023

As of 2026-04-10 “Relative location of seismic events using broadband frequency-wavenumber analysis: Application to the North Korean Nuclear Test Site” is published in final form in @rasjournals.bsky.social RAS Techniques and Instruments (doi.org/10.1093/rast...) Let's take a look ... (1/n)

Are you attending the SSA annual meeting in Pasadena this week and want to know more about Seismica? A few of our volunteers will be there, so keep an eye out for @gfun.earth @ezgikarasozen.bsky.social @allenos.bsky.social @taranye.bsky.social @seislologist.bsky.social and Yen Joe Tan and say hi!

🌋Éruption au Piton de la Fournaise.
Prise de vue ce matin, 10 avril.
Les coulées de lave restent actuellement localisées en amont des Grandes Pentes. Et l'activité de fontaines de lave est visible depuis le Piton de Bert.
©Clément, Helilagon

I absolutely love this article. Nodding along and smiling as I was reading it. I recognise so many of the feelings evoked when we step outside of our metal boxes and allow ourselves to be 'a part' of the places we travel though, rather than 'apart' from them.

Please read and enjoy ❤️

🌋 Éruption au Piton de la Fournaise
Prise de vue du site éruptif ce matin à 9h10, heure locale. On y observe un lac de lave toujours actif, au sein d’un cône désormais bien refermé (© OSUL – Lyon 1 Université)

WARNING: May cause indigestion.

Jeremy Bowen: Trump is waging war based on instinct and it isn't working One month into the conflict in Iran, Trump's gut-instinct approach is not proving effective, writes the BBC's international editor.

www.bbc.com/news/article...
All you can eat, feast for thought.

It's pretty fucked up that we ended up with "you must pay thousands of dollars to a corporation to have freedom of movement" in most places.

Progressive Paris has many weapons to fight the far right, but the best? Spaces where you can simply hang out | Alexander Hurst Drop into any of the French capital’s ‘third places’ and you’ll find food, culture, community – and an antidote to the disaffection extremists feed on, says Guardian Europe columnist Alexander Hurst

"Where other cities have forfeited the existence of third spaces to commerce, Paris has actively facilitated their existence... In doing so it has made a statement as politically radical as any purported 'war on cars'. There is a right to simply be that is not conditional on one’s ability to spend."

Massive Pyroclastic Flow Reaches the Base of Semeru Volcano (Mar 20, 2026) YouTube video by afarTV

🌋 A large pyroclastic density current (PDC) was caught on camera on the 20th of March at #Semeru (Indonesia)

youtu.be/Hi1TUpzMSOA

I have a joke about geophysics, what do you want the punch line to be?

Some news from La Réunion island 👇. Piton de la Fournaise #volcano eruption that started Feb. 13 continues. Lava flows reached the sea yesterday.
Follow @ovpf.bsky.social for regularly updated infos.

🌋Éruption au Piton de la Fournaise
Arrivée de la lave à l'océan. Prise de vue aux alentours de 9h heure locale.
© Gendarmerie de La Réunion / SAG / PGHM

One century of anthropogenic melting of Glacier Blanc, southern French Alps (Ecrins massif)! 🧊🔥

📷 Source: RTM / ONF and Ecrins National Park

Mer de Glace from Signal Forbes
1890 | 2013 | 2021 | 2024

Strong acceleration of the demise of the largest French glacier over last few years! 🧊🔥

Ubehebe crater. A phreatomagmatic eruption, where magmas impinge upon wet sediment or groundwater causing rapid vaporization. Volume expansion during vaporization causes the water saturated overburden (roof) to explode. Sudden depressurization causes magma to then erupt catastrophically.

🌋Retour en images sur une semaine d'éruption au Piton de la Fournaise.

Après une semaine d'éruption, l'activité est focalisée sur un seul site éruptif sur le flanc sud-sud-est du volcan où un cône est en cours de formation par accumulation des projections de lave.

©OVPF-IPGP

A thread for the 15-year anniversary of the 2011 Christchurch earthquake. I won’t have a chance to post it on the day, so I’m doing it a couple days early. Note that the work I’m posting was carried out by many brilliant people. 1/

The Worst-Case Future for White-Collar Workers The well-off have no experience with the job market that might be coming.

I've been thinking about this a lot. AI will make everyone except the 0.01% worse off.

🌋Prélèvements de lave ce matin (16/02/2026) par les équipes de l'OVPF-IPGP.
Malgré une baisse d'intensité par rapport aux premiers jours de l'éruption, l'activité se poursuit.

🌋 Les premières minutes de l'éruption au Piton de la Fournaise un peu après 10h heure locale (06h UTC) le 13 février 2026.

In response to the Dec. 6 Mw 7.0 earthquake in southwest Yukon, colleagues and I put together this short paper for the YGS's annual Yukon Exploration and Geology volume.

data.geology.gov.yk.ca/Reference/96...

⚒️🧪Fiery Mud Volcano Eruption!

The Daşmərdan (Dashmardan) mud volcano in Azerbaijan erupted ~16:50 on the 30th Jan 2026. The eruption lasted ~15 mins and was accompanied by a pillar of flame several hundred meters high. Daşmərdan had previous documented eruptions in 1866, 1954, 1976, 1986 and 2011.