r/EarthScience

A magnitude 5.6 earthquake just struck directly beneath Mount Fuji — JMA puts the follow-up probability at 10-20% and the monitoring window at 7 days. The 1707 precedent took 49.
▲ 134 r/EarthScience+6 crossposts

A magnitude 5.6 earthquake just struck directly beneath Mount Fuji — JMA puts the follow-up probability at 10-20% and the monitoring window at 7 days. The 1707 precedent took 49.

JMA confirmed no changes in volcanic monitoring data after the June 26th M5.6 at 20km depth near Fujikawaguchiko. The agency issued a standard one-week caution window citing 10-20% historical frequency of comparable follow-up events.

The part missing from most coverage: the 2012 NIED study estimated magma chamber pressure beneath Fuji at 1.6 MPa following the Tōhoku earthquake — 16x the 0.1 MPa threshold associated with the 1707 Hōei eruption, which occurred 49 days after the M8.6 Nankai earthquake, well outside the standard monitoring window.

Full analysis with sources: https://youtu.be/l0A7xswu1sM?is=68d-VS0lv6j3tvTt

youtu.be
u/larolita_ — 1 day ago
▲ 43 r/EarthScience+1 crossposts

Why did it take so long for science to accept continental drift?

“Continental drift is as fundamental to geology as natural selection is to biology. Why did it take us hundreds of years to discover it?”

worksinprogress.co
u/vidmeduffy — 5 days ago
▲ 599 r/EarthScience+5 crossposts

A volcanic eruption as seen from space, image shows the Sarychev Peak volcano on Matua Island in the Kuril Islands chain, taken from the International Space Station. It captures an early stage of an eruption on June 12, 2009

u/Front-Coconut-8196 — 8 days ago
▲ 85 r/EarthScience+3 crossposts

Interesting Natural Phenomena - Coastal Uplift

On Wednesday 24th June, Venezuela experienced deadly 7.1 and 7.5 earthquakes (death toll nearly to 1000). Trinidad and Tobago is 11km or 7 miles off the coast of Venezuela, at the nearest point you can see the country without binoculars.

On one of the coastal beaches, a local group (South West Adventures) documented coastal uplift that has not been seen or experienced in Trinidad and Tobago before. It is not confirmed, but it is suspected that it is related to the earthquakes as this occurred after the earthquakes.

Video here

The first half of the video shows the coastal uplift, the second half shows some marine life that were trapped by boulders...this part is also perplexing. I'd be curious to hear your thoughts about it.

u/Stoked_Coconut — 7 days ago
▲ 13 r/EarthScience+3 crossposts

New research confirms the supervolcano-style monitoring at Kīlauea has scientists watching the next 72 hours closely — 49 episodes and counting

Kīlauea has produced 49 fountaining episodes since December 2024 — more than any episodic eruption ever recorded at this volcano, officially surpassing the historic Puʻu ʻŌʻō sequence (47 episodes, 1983-1986) that eventually transitioned into a 35-year lava flow.

USGS's latest update has narrowed the forecast window for episode 50 to June 25-27, with June 26 flagged as most probable. That's not a guess — it's based on measured tiltmeter inflation and gas emission data at the summit.

Full breakdown with sourcing:

https://youtu.be/xpDqKN4ifo0?is=RG8URkGdBSTa4iwS

youtu.be
u/larolita_ — 10 days ago
▲ 0 r/EarthScience+2 crossposts

ELI5 Can someone explain California to me?

In the same green field you’re equally likely to find an oak tree and a palm tree. Doesn’t matter if you’re 2 miles from the coast or in the plains.

Speaking of plains, right next to a lush forest with epic mountains are vast plains for days with golden hills and mountains, with a reservoir right in the middle.

Not an hour’s drive away you see these green rolling hills with substantial vegetation, then all of a sudden a little sand dune pops up in the middle.

Somehow this place has a little bit of everything you’d find anywhere else in the country (hell maybe the world), and yet simultaneously it looks like nowhere else.

reddit.com
u/playsoft245 — 11 days ago
▲ 39 r/EarthScience+2 crossposts

Two Earthquakes, 39 Seconds Apart: Inside Venezuela's 24 June 2026 Doublet [OC]

On Wednesday evening, the ground southeast of Yumare ruptured in a magnitude 7.2 earthquake. Thirty-nine seconds later, before the first quake's waves had even finished crossing the country, a second, larger shock hit almost the same spot: magnitude 7.5.

That ordering is the strange part. In a normal sequence the biggest shock comes first and everything after is an aftershock. Here it ran backwards. The USGS called it a doublet: two comparable mainshocks, not a quake and its echo.

I wanted to understand how that actually happens, so I wrote a long piece working from the physics out to the tectonics, why one rupture can light the fuse on the next through static and dynamic stress transfer, why this particular coastline (the Boconó–San Sebastián–El Pilar system) was primed to fail, why the tsunami warning was issued and then cancelled within the hour, and why northern Venezuela has done versions of this in 1812, 1900, 1967, and 1997. The 1812 event, it turns out, may itself have been a doublet.

Every figure is sourced to the primary literature (Kagan & Jackson on doublet statistics, King/Stein/Lin on Coulomb stress, the GPS and InSAR work on El Pilar creep), and I've tried to be careful about what's confirmed versus what's still preliminary this early after an event.

geoscopy.com
u/Geoscopy — 11 days ago
▲ 5 r/EarthScience+2 crossposts

Asthenosphere breaks

What if the magma inside the mantle starts behaving like the Sun, emitting intense thermal radiation upwards? This massive heat and radiation cause phase transformations in minerals and drastically alter the asthenosphere, making it highly elastic like a thin sheet of rubber. Under continuous mechanical stress, will the tectonic plates stretch and eventually rupture or break? What is your opinion

reddit.com
u/photographymodel — 10 days ago

Theory

What if the core of the earth has life in it

Like the outer surface is the core and inside it it is a civilization and most probably the ice age and when the outer earth -where we live will erase the inner earth will enlarge and take over.

reddit.com
u/Atheism_promoter001 — 12 days ago