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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity, #Sismologia
Etna - activity of the new south-eastern crater on 08/29/2020 - photo Gio Giusa

Etna - activity of the new south-eastern crater on 08/29/2020 - photo Gio Giusa

The National Institute of Geophysics and Volcanology, Etneo Observatory, announces that the activity of the new SE crater of Etna is characterized, from the morning of August 28, by a discontinuous and modest ash emission which produces a strongly volcanic cloud. diluted, light gray in color.

The volcanic cloud, which reaches a height of about 4.5 km above sea level, is quickly dispersed eastward by high-altitude winds.

Concerning the temporal trend of the mean amplitude of the volcanic tremor: it continues to show marked amplitude fluctuations with respect to the whole, defining a substantially stationary trend which is mainly maintained in the range of mean values. The location of the source of the quake is located near the SE crater / new south-eastern crater, at a depth of about 2900-3000 meters above mean sea level.

From an infrasonic activity perspective, over the past 24 hours, events have mainly resulted from areas at the New Southeast Crater and the Northeast Crater.

Analysis of the data from the permanent and clinometric GNSS networks shows no significant soil deformation.

 

From 11:30 UTC, the ash emission gradually intensified at New SE Crater, which produced an eruptive cloud that reached a height of about 4.5 km above sea level towards the EAST / BORN.

There are currently no reports of ash fall in the inhabited centers of the Etnean region.

Concerning the temporal trend of the mean amplitude of the volcanic tremor, it continues to show marked amplitude fluctuations compared to the whole.
 

Etna - ash plume from the new south-eastern crater on 08/29/2020 - photo Gio Giusa

Etna - ash plume from the new south-eastern crater on 08/29/2020 - photo Gio Giusa

Etna - amplitude of the tremor on 08/30/2020 - Doc INGV OE

Etna - amplitude of the tremor on 08/30/2020 - Doc INGV OE

The National Institute of Geophysics and Volcanology, Etneo Observatory, informs that around 14:55 UTC on August 29, the emission of ash at the new south-eastern crater has ceased.

There remains an intense degassing, sometimes accompanied by a discontinuous and light explosive activity.

 

Sources: INGV OE & Gio Giusa

Reykjanes Peninsula - location and magnitude of earthquakes as of 08/30/2020 / 6:55 am - Doc. IMO
Reykjanes Peninsula - location and magnitude of earthquakes as of 08/30/2020 / 6:55 am - Doc. IMO
Reykjanes Peninsula - location and magnitude of earthquakes as of 08/30/2020 / 6:55 am - Doc. IMO

Reykjanes Peninsula - location and magnitude of earthquakes as of 08/30/2020 / 6:55 am - Doc. IMO

At 7:06 p.m. and 7:08 p.m. on August 29, earthquakes M3.6 and M3.0 occurred just west of Kleifarvatn on the Reykjanes peninsula. Two earthquakes of similar magnitude, M3.4 and M3.0 occurred in the same location at 4:23 pm and 4:39 pm yesterday. The earthquakes were felt in the Reykjanes Peninsula, the capital region and Akranes. Smaller aftershocks have since occurred and are expected to continue.

The seismic activity is likely caused by stress changes in the crust due to multiple magma intrusions on the Reykjanes Peninsula since January this year.

 

Source: IMO

Yellowstone N.P. - Giantess Geyser - photo J.R. Douglass / NPS archives

Yellowstone N.P. - Giantess Geyser - photo J.R. Douglass / NPS archives

In Yellowstone, the Giantess Geyser, located in the Upper Geyser Basin, came into operation on August 25, after an eruption-free period of over 6.5 years.

See the video on: https://twitter.com/i/status/1299708384015458307

 

Source: Yellowstone NPS

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