Robin Lacassin @RobinLacassin@social.cleverlibre.org

https://twitter.com/USGSVolcanoes/status/1597431362382102528?s=20&t=Iz7DoAXDPJ0uTQ-9MUUR_Q

https://twitter.com/USGSVolcanoes/status/1597378480441884679?s=20&t=Iz7DoAXDPJ0uTQ-9MUUR_Q

Interesting National Geographic article by Robin George Andrews: "Hawaii’s #MaunaLoa erupts for the first time in 38 years. What happens next? For now, the #eruption does not threaten any populated areas, but scientists continue to closely monitor the largest active #volcano in the world."

https://www.nationalgeographic.com/science/article/hawaii-mauna-loa-erupts-largest-active-volcano-reawakens

It's dawn on the Mauna Loa #volcano summit. The USGS webcam captured daylight rising over the caldera filled by the new lava lake. Amazing view.

Updated news on the unrest: https://www.usgs.gov/volcanoes/mauna-loa/volcano-updates

Webcam on the rim of Mauna Loa summit caldera shows the lava lake that started filling up few hours ago. Last #eruption at Mauna Loa was in 1984.

#USGS Mauna Loa #volcano webcams: https://www.usgs.gov/volcanoes/mauna-loa/webcams

Updated news on the unrest: https://www.usgs.gov/volcanoes/mauna-loa/volcano-updates

More info on Mauna Loa (USGS webdoc with many maps): https://geonarrative.usgs.gov/maunaloa/

RT USGS:

https://twitter.com/USGSVolcanoes/status/1597166066496851968?s=20&t=CxhvzVTm-kPGSZMPPoCGnA

AND

https://twitter.com/USGSVolcanoes/status/1597167390739267584?s=20&t=CxhvzVTm-kPGSZMPPoCGnA

@Waldemar Here is a comparison of nighttime imagery few weeks before the war in #Ukraine in February, and now. I haven't explore the intrinsic variability not due to the war, but I think the difference is striking. The country is much darker now, towns are barely visible, which is at least partially due to the massive power cuts.

Open the link to play with the slider comparison. https://go.nasa.gov/3H4nn7Z

@Waldemar Fair comment. Will do.

After shelling of energetic infrastructures by Russia #Ukraine appears so dark on the nighttime satellite images. It looks like a desert area, but it is not.

People there are struggling with winter temperatures and war news.

Imagery from: https://worldview.earthdata.nasa.gov/?v=-15.138500618814131,28.210403664185364,58.70256690613667,68.56720823870361&l=Reference_Labels_15m(hidden),Reference_Features_15m,Coastlines_15m,VIIRS_SNPP_DayNightBand_At_Sensor_Radiance,VIIRS_SNPP_DayNightBand_AtSensor_M15(hidden),VIIRS_SNPP_CorrectedReflectance_TrueColor(hidden)&lg=true&t=2022-11-23-T22%3A52%3A20Z

I just learned that I'm working on material science 👇🏼
Our mailboxes are full of such toxic messages - waste of energy. Here a predatory company located in the USA (NJ). How to regulate this ?

@vickyveritas Here on qoto.org we don’t have this limit (max ~65000). I hope people on other instances can read my posts longer than 500… 🤞

Just received the big #climate book coordinated by Greta Thunberg @gretathunberg
Hours of interesting but frightening reading to come. Thanks in advance to all the authors.

@skanman Just to start I would recommend the books by Susan Hough:
• Predicting the Unpredictable: The Tumultuous Science of Earthquake Prediction
• Earthshaking Science: What We Know (and Don't Know) about Earthquakes

@skanman No. It's a recurrent question when #earthquakes happen grouped in time, but it's purely statistical.

There are between, let's say, 110 and 150 earthquakes with magnitude 6 to 6.9 each year (140 in 2021). In 2022 we got 113 so far, which is totally normal. Note also that no magnitude 8+ happened this year, which is low but also statistically normal.

Media often give the wrong impression of a temporary increase when several earthquakes happen in inhabited areas and are damaging. Media, and even geoscientists, generally do not speak of the numerous magnitude 5+ events (several per day) which is the magnitude of the Java #earthquake few days ago.

In 1999 the North Anatolian Fault (NAF), Turkey, broke during two destructive #earthquakes east of Istanbul (Mw7.4 Izmit and Mw7.2 Düzce earthquakes respectively on 17 Aug and 12 Nov).

Today's Mw6.1 #earthquake happened just east of Düzce with a faulting mechanism very similar to the 12 Nov 1999 event (strike-slip with small normal component). Its epicenter is located little to the north of the main NAF fault trace.

Map with MT and source function from #IPGP #Geoscope http://geoscope.ipgp.fr/index.php/fr/catalogue/description-d-un-seisme?seis=us7000irp8

Other map shows in red the fault broken by the two 1999 events (purple and red stars locate epicenters, yellow circles show aftershocks). From C ̧akir et al. GJI 2003 https://doi.org/10.1046/j.1365-246X.2003.02001.x.