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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
Kilauea / Halema'uma'u crater - return of lava as of 18.01.2022- USGS image by K. Mulliken. - one click to enlarge

Kilauea / Halema'uma'u crater - return of lava as of 18.01.2022- USGS image by K. Mulliken. - one click to enlarge

At Kilauea, lava returned to the western vent of Halema'uma'u Crater around 10:45 a.m. HST on January 18, 2022. The extent of the active lava lake and the overall effusion rate began to decrease yesterday after - noon on 20.01. The active lava lake was confined to a small pond north of the western vent cone overnight. Just after 4:00 a.m. HST this morning the lava effusion rate increased and at 7:00 a.m. HST this morning 21.01 the active extent of the lava lake resumed its previous extent.

The lava lake has experienced a total elevation of approximately 83 meters since the lava emerged on September 29, 2021. Measurements on January 14, 2022 indicated that the total volume of lava spilled since the start of the eruption was d 'about 45 million cubic meters. at this moment.
The volcanic tremor associated with the eruption - as recorded by nearby seismometers - waned until about 8 p.m. yesterday. HST, then started to rise from around 5:30am this morning. The most recent sulfur dioxide (SO2) emission rate of approximately 2100 tonnes per day was measured on January 19, 2022.


Current volcanic alert level: Watch
Current Aviation Color Code: Orange

 

Source: HVO

Turrialba - 2022.01.22 at 9:34 a.m. - The surroundings of the active crater are grayed out with ash from the January 17 eruption. - Ovsicori webcam - one click to enlarge

Turrialba - 2022.01.22 at 9:34 a.m. - The surroundings of the active crater are grayed out with ash from the January 17 eruption. - Ovsicori webcam - one click to enlarge

In Turrialba, Costa Rica, no eruption is reported on the surface as of January 21
Seismic activity is similar, compared to yesterday.
At the time of this report, the winds are blowing to the northwest.
Degassing is observed in the active crater.

Frequent high and low frequency earthquakes are detected. In recent days, geodetic observations show no significant change. Gas ratios and SO2 concentration are within the range of the past few days.

The surroundings of the active crater are grayed out with ash from the January 17 eruption.

The alert level is at 3.

 

Source: Ovsicori

 Fuego - photo archive W.Chigna via Conred / 2020.12

Fuego - photo archive W.Chigna via Conred / 2020.12

Due to the change in wind direction at a height of 4500 meters above sea level. The rumblings of the shock waves are heard in several towns on the eastern flank of the Fuego volcano, they have also been reported on the southern and southwestern flank of the capital.

The OVFGO reports weak, moderate and some strong explosions, in the range of 8 to 12 per hour, expelling columns of ash at an approximate height of 4,500 and 4,800 meters above sea level. (14 763 to 15,748 feet) extending west southeast, a distance of 15 kilometers. Sounds similar to a train locomotive for periods of 2-5 minutes.

Ash falls are reported on the communities of Morelia, Santa Sofía, Panimache, La Rochela, Ceilán, Osuna. On the sides of the crater constant avalanches of blocks in all directions, some reaching the vegetation.

 

Source: Insivumeh

West Iceland, north of Lundarreykjadalur. - seismic swarm on 01.23.2022 - Doc. IMO

West Iceland, north of Lundarreykjadalur. - seismic swarm on 01.23.2022 - Doc. IMO

A swarm of earthquakes has been ongoing since December north of Lundarreykjadalur in West Iceland.

Vedurstofan located more than 250 earthquakes in the swarm which is IMO's strongest ever recorded in this region, both in terms of seismic energy and number of events (our records go back 30 years ).

 

Source: Kristin Jonsdottir

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