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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
Popocatépetl - exhalation of 13.03.2021 / 06:14 - webcams of Mexico / Cenapred

Popocatépetl - exhalation of 13.03.2021 / 06:14 - webcams of Mexico / Cenapred

Popocatépetl - exhalation of 13.03.2021 / 07:19 - webcams of Mexico / Cenapred

Popocatépetl - exhalation of 13.03.2021 / 07:19 - webcams of Mexico / Cenapred

During the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 63 exhalations and 487 minutes of tremor have been identified, accompanied by emissions of water vapor, volcanic gases and small amounts of ash.

Based on information from the National Communications Center (CENACOM), yesterday a slight fall of ash was reported in the municipalities of Amecameca and Tlalmanalco around 22:50.

Meanwhile, a constant emission of water vapor, gas and small amounts of ash is observed, which is dispersed in a north-westerly (NW) direction.

The recent flyby confirms that there was no lava dome inside the crater.

The volcanic alert remains at amarillo Fase 2.

 

Sources: Cenapred and webcams of Mexico

Pacaya - ash plume on 03.13.2021 - Doc. Insivumeh

Pacaya - ash plume on 03.13.2021 - Doc. Insivumeh

Pacaya - ash plume and lava flow on 03.13.2021 - Conred video screenshot

Pacaya - ash plume and lava flow on 03.13.2021 - Conred video screenshot

The Pacaya maintains a high level of activity, with bursts of explosions, accompanied by plumes of gas and ash up to 4,500 meters asl. moving southwest and south, for 30 km.

Expulsions of ballistic materials are observed up to 400 meters above the pit.

The active lava flow on the southern flank has a length of 1,500 meters. Blocks falls are generated from the lava front.

Ash falls are possible on El Patricinio, San José El Rodeo, Los Pacitos, Pacaya and Finca El Chupadero.

The Conred invites the municipalities of San Vicente Pacaya and Villa Canales to close access to the flanks of the volcano, and recalls that the Pacaya National Park must continue to prohibit access to areas of active lava flows.

 

Sources: Insivumeh & Conred

Sinabung - the summit and the dome on 03.13.2021 - photo Firdaus Surbakti

Sinabung - the summit and the dome on 03.13.2021 - photo Firdaus Surbakti

A white plume with a strong thickness is observed this March 13 at about 50 to 700 meters from the summit of Sinabung.

Seismicity is characterized by:

- 1 eruption earthquake, with an amplitude of 26 mm, and the duration of the earthquake was 277 seconds.
- 47 collapse / avalanche earthquakes, with an amplitude of 2-34 mm and the earthquake lasted 20-130 seconds.
- 14 emission earthquakes
- 21 low frequency earthquakes.
- 102 hybrid / multiphase earthquakes
- 4 local tectonic earthquakes
- 2 remote tectonic earthquakes.

The dome (s) is (are) constantly evolving, and these photos differ depending on the point of view.

 

Sources: PVMBG, Magma Indonesia, the photographers cited.

Sinabung - the dome from various points of view on 03.11.2021 - photos Endro Rusharyanto - one click to enlarge the thumbnailsSinabung - the dome from various points of view on 03.11.2021 - photos Endro Rusharyanto - one click to enlarge the thumbnails
Sinabung - the dome from various points of view on 03.11.2021 - photos Endro Rusharyanto - one click to enlarge the thumbnailsSinabung - the dome from various points of view on 03.11.2021 - photos Endro Rusharyanto - one click to enlarge the thumbnails

Sinabung - the dome from various points of view on 03.11.2021 - photos Endro Rusharyanto - one click to enlarge the thumbnails

In the Reykjanes Peninsula, today March 14, more than 700 earthquakes have been automatically located. The two largest at 01:19 from M3.7 to SW-Fagradalsfjall and at 04:40 from M4.2 in the same area.

Yesterday, around 2,600 earthquakes were detected. The biggest earthquake occurred at 1:34 am on M4.6. by the southwest end of Mt. Fagradalsfjall, it was widely felt, on the Reykjanes peninsula, north of Borganes and east of Fljótshlíð. In the evening at 10:06 p.m., an earthquake from an M4.1 was also measured by Mt. Fagradalsfjall.

Reykjanes Peninsula - location and magnitude of earthquakes as of 14.03.2021 / 08:20 - Doc.IMO
Reykjanes Peninsula - location and magnitude of earthquakes as of 14.03.2021 / 08:20 - Doc.IMO
Reykjanes Peninsula - location and magnitude of earthquakes as of 14.03.2021 / 08:20 - Doc.IMO

Reykjanes Peninsula - location and magnitude of earthquakes as of 14.03.2021 / 08:20 - Doc.IMO

It is important to keep track of activity in the southern region of Mt. Fagradalsfjall to assess whether the dike is expanding to the south.
The latest satellite images and GPS data show that the magma buildup is concentrated at the southern end of the dike under Mt. Fagradalsfjall. It is currently the most likely site for a possible eruption.

According to the Meteorological Bureau's lava flow model yesterday, a fissure is located where the magma tunnel is in Nátthaga, near Fagradalsfjall.
"There are two possibilities: no eruption or eruption ... as the magma and the corridor lengthens towards the south, we have to prepare for it to start to erupt, but that is not certain. . ", according to Magnús Tumi Guðmundsson, professor of geophysics in an interview with mbls.

 

Sources: IMO & mbls

Everything seems calm in Nátthaga (probable site of the potential eruption - on the webcam), but in the basement, things are moving!
Everything seems calm in Nátthaga (probable site of the potential eruption - on the webcam), but in the basement, things are moving!

Everything seems calm in Nátthaga (probable site of the potential eruption - on the webcam), but in the basement, things are moving!

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