Anthony Lomax @ALomax@qoto.org

These are the signals on the same station for the earthquakes in 2021 together with the USGS focal mechanism (that I posted on Twitter way back when).
The seismic signals are like fingerprints and you get a sense of deja vu when you see them again.

Magnitude 5.5 #earthquake in #Gabon 30 minutes ago (2022-12-04Z09:53).
Signal on station G.EDA (courtesy of the #GEOSCOPE global #seismic network and made available via #IRIS) - displayed using @obspy software. There were two very similar events here in March 2021 but today's is larger. https://earthquake.usgs.gov/earthquakes/eventpage/us6000j6u0/executive

IPGP #SCARDEC solution for today unusual Mw 5.6 #earthquake in #Gabon. Relatively shallow normal faulting. http://geoscope.ipgp.fr/scripts/seismes/fiche.php?seis=us6000j6u0 http://geoscope.ipgp.fr/seismes/events/2022/us6000j6u0/carte.jpg

USGS has live stream from web cam close to the main active fissure 3 on Mauna Loa #MaunaLoa showing lava fountain #lava #fountain

https://youtube.com/watch?v=SnjGqn1K9ZQ&feature=share

My sport is walking. Unlike other sports, it doesn't imperil my brain health, make me cry, or break my heart. Instead it helps my brain and heart, and lifts my spirits every day. There are no losers in this sport, only winners.

“To cross the southern coast of England, west to east, is thus to travel forwards - and at breathtaking chronological speed - in a self-propelled time-machine. With every few hundred yards of eastward progress one passes through hundreds of thousands of years of geological time: a million years of history goes by with every couple of miles march.”
― Simon Winchester, The Map That Changed the World: William Smith and the Birth of Modern Geology

In 1793, William Smith, was a surveyor by trade and trained in mapping and geometry. He apprenticed under England’s master surveyor, and traveled all over England surveying for canals. Smith became an expert in England’s rocks noting that they, and the fossils they contained, occurred in vertical layering representing successively older rocks the deeper he dug, and that the fossils within changed the deeper he went. Smith realized that the same sequences of rock could be correlated over vast horizontal distances, indeed over the entirety of England, and could be used to trace the underpinning rock to facilitate mapping. His epiphany became the Principle of Faunal Succession and became the key to unlocking Deep Time.
https://www.earthobservatory.nasa.gov/features/WilliamSmith/page3.php

Smith began traveling all across England while surveying for minerals, noting the rocks and fossils and began recording and mapping the rocks, choosing a different color for each rock type and estimating the extent and boundaries it covered. In 1815 he published his geological map which covered England, Wales, and part of Scotland and contained a stratigraphical analysis with the fossil index of each layer. It was the largest geological map of its time and contained a geological cross-section that revealed the 3D geometry of the rock beds.

Sadly, William Smith fell upon rough times, and it wasn’t until 1831 that he became widely recognized as the Father of English Geology and Stratigraphy, and he was bestowed with honorary degrees, titles, and a pension for the rest of his life. His beautiful map remains today as one of the greatest breakthroughs in Geology.

#WilliamSmith #geology #stratigraphy #StrataOfEnglandWalesAndScotland #fossils #rocks #GeologicalMap #map

One of my happy places: the eastern Sierra

Another excellent view of the #MaunaLoa upper northeastern rift zone with the active erupting fissure in the foreground. The summit caldera is in the back.

Reminder, USGS public domain aerial images are here: https://www.usgs.gov/observatories/hvo/news/photo-and-video-chronology-hawaiian-volcano-observatory-november-28-2022

Good morning! A post just rolled across my fedi-timeline saying not to post about politics on Mastodon, so I'm here to remind you that:

1 "politics" refers to decision-making about how to live together in groups
2 choosing to not participate in political discussion is saying you support the status quo, and is a political stance
3 abstaining from politics because you feel safe from its impacts is a privilege and a choice to abandon your more vulnerable neighbours

The new Paris 2021-26 urban biking plan will invest €250 million to, among other things, make 52km of pandemic bike-lanes permanent; add 130km of new bike-lanes; add 130K new bike parking spots; & teach all elementary school students to bike.

Leadership.

https://www.paris.fr/pages/un-nouveau-plan-velo-pour-une-ville-100-cyclable-19554

#Paris #cities #urbanism #leadership #Hidalgo #bikes #bikelanes #transportation #mobility #urbanplanning #urbanbiking #citybuilding

Mt. Rainier casting a shadow upwards across the sky.

So, what if Earth had rings? It'd certainly be a beautiful sight to see every night! The Earth is too close to the Sun to maintain icy rings like Saturn as depicted here, though could host a rocky one. We probably did have one briefly after a massive planetary collision, but that rapidly coalesced into the Moon we have today. Undoubtedly if it existed today, it would wreak havock on our communication satellites.

#Space #Science #Astrodon

I still think that #machinelearning is a misnomer. We could have called it "regression machines", "complex regression", "complex pattern generator". That eould have meant less grant money and less Nature papers, but also a lot less confusion about what #ml can and cannot do.

Okay, here's a second attempt to post inspiring #geology photos, this time with a text description. I'm still figuring out how things work here. #RethinkCommitteeWork

M 6.0, Turkey
2022-11-23 01:08:16 40.99 31.11 10 km A
http://geofon.gfz-potsdam.de/eqinfo/event.php?from=rss&id=gfz2022wxsg

Probably directly relevant to today’s M6.1 earthquake near Duzce: a map of earthquakes along the North #Anatolian #fault, where in 1999 the Izmit M7.5 #earthquake in August was followed by a M7.2 event near #Duzce a few months later. Both events were devastating, but much larger than today’s #quake.