Fly along the San Andreas Fault in Southern California from the Cajon pass to Palmdale. Faults are rarely one single fault strand; they are often broad areas of deformation called fault zones. Lots of critical infrastructure like highways, powerlines, and railroads cross the San Andreas Fault.

Between November 3 (12:00 AM PST) and November 9 (11:59 PM) there were 50 earthquakes in California of magnitude 2.0 or larger. 🔸45 quakes between magnitude 2.0 - 2.9 🔸5 quakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.8 near San Ramon, CA.

The underwater seismometer network is so great, as evidenced from yesterday's EQ off-Tohoku. Reposting unofficial visualization by x.com/kotoho76/sta...

If this geology thing doesn’t work out I could probably get work as a line cook at IHOP. Lord knows I make enough pancakes! 🥞

This same area had another sequence that started in 11/2002 that continued into 2/2003. That sequence included a bunch of M3+ events and a few M4’s just to the southeast (not included on this list below). Data from ds.iris.edu/ieb/index.ht...

Just over here looking at earthquakes and making my pancake flowers. #scientistmomlife

Interesting little earthquake sequence happening near San Ramon. earthquake.usgs.gov/earthquakes/...

I’m so grateful for the people that lived in our house before us and planted beautiful flowers everywhere. Something is always in bloom.

I guess not being allowed to sexually harass people at work really killed the vibe.

Earthquake Prediction Flowchart from @xkcd.com. cc: @drwendyrocks.bsky.social

She guards my rest.

🚨JOB ALERT : ENGINEERING SEISMOLOGIST 🚨 Come and work with us in the Seismic Hazards Program at the California Geological Survey! 💰 $6,488 - $12,215 / month 📆 Application due: 11/17/2025 calcareers.ca.gov/CalHrPublic/...

Just over here blasting “Father Figure” by TS while I pursue election results and sip my coffee ☕️

NBC called it! 🎉

🎉🎉🎉

Woohoo for my home state!!! 🎉 www.cnn.com/2025/11/04/p...

Between October 27 (12:00 AM PST) and November 2 (11:59 PM) there were 43 earthquakes in California of magnitude 2.0 or larger. 🔸39 earthquakes between magnitude 2.0 - 2.9 🔸4 earthquakes between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.5 west of Petrolia, CA.

M 6.3 earthquake 22 km WSW of Khulm, Afghanistan earthquake.usgs.gov/earthquakes/...

A lot of people care a lot about balls. ⚾️

Coffee and book just out of frame *chefs kiss of a morning*

Me yow! 🐈‍⬛

Got up early and made the kids pancake ghosts and pumpkins on a bed of spider webs (with chocolate spiders stuck in the webs). 👻 🕸️ 🎃 🥞 Can I have my mother of the year award now? 🤣

Halloween costumes to scare scientists (by @twisteddoodles.bsky.social) 🧪

Great article by @squigglyvolcano.bsky.social for @sciam.bsky.social detailing how seismic recordings can be used to estimate the intensity of hurricanes, both past and present. 🧪 www.scientificamerican.com/article/seis...

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...

Not all Halloween themed destinations in California are scary. Pumpkin Rock 🎃 gives family friendly, wholesome Halloween vibes!

Q: Why are margaritas the safest Halloween drink? A: The liquor is in the middle of a salt circle, so ghosts and demons can’t get to it. 😉 👹👻

Let's explain rocks by sandwiches. Trust me. Earth builds rock three main ways: it stacks, it cools from melt, or it presses and reheats what it already made. #Geology 🧵

It’s National Cat Day (thanks for the heads up @timblor.bsky.social) so here is my cat Mrs. Norris sleeping in a drawer.

M 5.4 earthquake off the coast of Oregon. That Blanco Francture zone just popping off a little. earthquake.usgs.gov/earthquakes/...

Post a perfect album from the 90's that isn't Nirvana, Pearl Jam, Soundgarden, or Alice In Chains.

Looks like the science community has found a home. academic.oup.com/icb/article-...

I’m back on my Halloween 🎃 nonsense with two creepy California canyons - ☠️ Deadman’s Canyon and 🩸 Bloody Canyon. Their dark and sordid histories are enough to send chills up your spine. Have you traveled to these dark destinations?

This past week we had 58 earthquakes in California of magnitude 2+. Is that more earthquakes than usual? Not really. For instance, during September and October 2025, California averaged 49 earthquakes a week. However, the actual number varies from week to week. 1/

4 days of seismic records from a seismic station in Jamaica shows Hurricane Melissa roaring towards the island. Hurricanes increase the amplitude of ocean waves which beat on the coast and sea floor. These produce Rayleigh waves that can be seen as increasingly thick “wiggles” in seismic records 🧪

Between October 20 (12:00 AM PST) and October 27 (9:00 AM) there were 58 earthquakes in California of magnitude 2.0 or larger. -50 quakes between M2.0 - 2.9 -8 quakes between M3.0 - 3.9 The largest earthquakes were both magnitude 3.5. One occurred near Petrolia and the other was near Redway.

Whenever people complain about the number of folks relying on food stamps, it is worth reminding them that SNAP is, by too large of a degree, a subsidy for corporations that refuse to pay a living wage and their political allies who reject public policy prescriptions to reduce income inequality.

Deep in the heart of Lassen Volcanic National Park this otherworldly basin bubbles and steams, a reminder that the earth beneath Lassen isn’t dead, only sleeping.🔥🌋☠️

California has some downright devilish 😈 place names. Have you ever been to any of these dark destinations?

JFC 🤦‍♀️

How I feel making my silly little videos during 2025

A ghost forest 👻 🌲 is an area of standing dead trees, often found in coastal regions where trees have been inundated with saltwater. The salt slowly poisons the trees, leaving behind eerie, skeletal looking remains. ☠️ But what causes this to happen? 🧪 youtube.com/shorts/CwYk7...

14 years 💍

Do you know how many ghost towns are there in California? 👻

Wow. Newsbreak keeps making up completely fictitious earthquakes. Pages of reporting on another earthquake that didn’t happen.

When the Earth Moves: 25 Years of Probabilistic Fault Displacement Hazards eos.org/editors-vox/...

Between October 13 (12:00 AM PST) and October 19 (11:59 PM) there were 49 earthquakes in California of magnitude 2.0 or larger. -48 quakes between magnitude 2.0 - 2.9 -1 quake between magnitude 3.0 - 3.9 The largest earthquake was a magnitude 3.1 near Hayfork, CA.

🚫 👑

Amen

Happy Geologic Map Day! The @cageosurvey.bsky.social produces geologic maps at various scales & derivative maps showing important aspects of geologic hazards or resources. #EarthScienceWeek