Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
dmv.community is one of the many independent Mastodon servers you can use to participate in the fediverse.
A small regional Mastodon instance for those in the DC, Maryland, and Virginia areas. Local news, commentary, and conversation.

Administered by:

Server stats:

172
active users

dmv.community: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.4

#caldera

0 posts0 participants0 posts today
Public
Cosmic Librarian

Volcanic Activity Beneath Yellowstone's Massive Caldera Could Be on The Move

Volcanic activity bubbling away beneath the Yellowstone National Park in the US appears to be on the move.

New research shows that the reservoirs of magma that fuel the supervolcano's wild outbursts seem to be shifting to the northeast of the Yellowstone Caldera. This region could be the new locus of future volcanic activity, according to a team led by seismologist Ninfa Bennington of the US Geological Survey.

#Yellowstone #caldera #supervolcano #geology

sciencealert.com/volcanic-acti

ScienceAlert · Volcanic Activity Beneath Yellowstone's Massive Caldera Could Be on The MoveVolcanic activity bubbling away beneath the Yellowstone National Park in the US appears to be on the move.
Public
Thorsten Leemhuis (acct. 2/4)

Side note: #Caldera #Linux was the second distributions I regularly used for a while. That iirc was in the year 2000[1] for a few months.

My first had been #SUSE, which back then was what most people in #Germany preferred. Had also used it only for a few months, it somehow never felt like a good fit.

The third distributions I regularly used was #RedHat Linux, which became #Fedora a little later – which is what I'm still using 24 years later…

[1] yes, I had stayed on OS/2 for way too long… 🥴

machaddr.substack.com/p/the-hi

André Machado | Blog · The History of Caldera LinuxBy André Machado
Public
💧🌏 Greg Cocks

A Seismic Precursor 15 Min Before The Giant Eruption Of Hunga Tonga-Hunga Ha'apai Volcano On 15 January 2022
--
doi.org/10.1029/2024GL111144 <-- shared paper
--
"KEY POINTS:
• The volcano generated Rayleigh waves about 15 min before the giant eruption with no apparent surface activity
• These waves dominated in 0.03–0.1 Hz with amplitudes comparable to the amplitude of M4.9
• Seismic stations 750 km from the volcano and appropriate data analyses allowed [them] to capture precursors of the catastrophic eruption..."
#geology #seismology #tonga #volcano #eruption #vulcanism #HungaTonga #RayleighWave #earthquake #precursor #remotesensing #imagery #satellite #HTHH #model #modeling #spatialanalysis #spatiotemporal #caldera #seismicstation #monitoring #naturalhazard #naturaldisaster #risk #hazard #engineeringgeology

geology cross sections / schematics - Schematic cross-section of the HTHH before the January 15 eruption (Alvarez & Camacho, 2023) (a), the eruption onset shortly after 4:00 (b), and the climactic phase starting around 04:15 (c). A scenario from the precursor to the eruption consists of high-pressure magma beneath some parts of the circular weak zone (d), tensile fracture generating the precursor around 03:45 (e), penetration of magma, magmatic gas, and seawater into the fracture (f), and magma-water interaction triggering the eruption (g).
map and chart - (a) A map (Google Earth) of the seismic stations (MSVF and FUTU) about 750 km from the HTHH. The yellow lines are the azimuth range of the Rayleigh wave arrivals at each station (See Section 3). The azimuths, , defined clockwise from the north, are estimated in a 64-s-long time window shifted every 4 s in 03:47:29–03:52:29 on 15 January 2022. The right panels show the results at MSVF (b) and FUTU (c) as functions of the product of vertical-to-north and vertical-to-east cross-correlation coefficients, representing the prominence of the Rayleigh wave in data. Red data points with good correlation ( 0.83) are used for drawing the yellow lines in panel (a). The horizontal red dotted lines are the geographical directions from the stations to HTHH.
photos - sequences - eruption of Hunga Tonga-Hunga Ha'apai Volcano, Tonga, 2022
charts - (a) The RMS of vertical velocity components in 0.04–0.08 Hz, , observed at MSVF (blue) and FUTU (orange). The vertical-to-horizontal cross correlation coefficients are displayed in panels (b–e) by colors: (b) and (c) at MSVF, (d) and (e) at FUTU. The common horizontal axes are the time of January 15, from 02:30 to 04:45. All functions are calculated in 64-s-long windows, and the values are displayed at the windows' central time. The vertical axes in panels (b–e) are the time delay, , of relative to the horizontal components. The red vertical reference lines are at 03:49:20, 04:04:46, and 04:17:48, respectively. The orange arrows indicate the prominent Rayleigh wave pattern. (f–g) The transients of the Rayleigh wave power estimated in 0.07–0.09 Hz using at MSVF (blue) and at FUTU (orange) for the precursor (f) and the M5.8 earthquake (g). The times of the peaks and troughs of the transients, labeled by the circled numbers, are shown. The time differences are ①36 s, ②32 s, ③23 s in panel (f) and ①29 s, ②32 s, ③30 s in panel (g).
Public
Chuck Darwin

As Europe’s most dangerous volcano rumbles, Italians weigh the risk

In the red zone of the awakening #Phlegraean #Fields
-- the 🔥most dangerous volcano in Europe 🔥
-- ⭐️ 2,000-year-old ruins are rising from the earth,
⭐️thrust upward by hydrothermal force.

The water line is receding at the docks as the ground rises.

Thousands of #earthquakes, including one that drove 1,500 people into temporary shelter,
are sending shock waves of fear through coastal communities.

Residents are now keeping #emergency #bags packed,
preparing for larger quakes, or worse,
an eruption some experts fear could prove devastating.

Nearly 80,000 people blithely inhabit the #sulfureous #caldera, playing soccer in the streets and cooking rich ragus in apartments with majestic views of Capri and Ischia, the emerald isles across the Gulf of Naples.

In total, an estimated
🆘 485,000 people live in the designated danger zone of a smoke-belching behemoth the ancient Romans thought was an entrance to Hell.

The most pessimistic experts signal it may even be time to consider relocating,
presenting residents with a stark choice:
Should they stay or should they go?

washingtonpost.com/world/2024/

The Washington Post · Europe’s most dangerous volcano rumbles, and Italians weigh the riskBy Anthony Faiola
ExploreLive feeds
About