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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
Hot spot(s) at the Iodake crater of Satsuma Iwo Jima from 16.04.2020 - Sentinel-2 L1C image from 16.04.2020 bands 12,11,4 - one click to enlarge

Hot spot(s) at the Iodake crater of Satsuma Iwo Jima from 16.04.2020 - Sentinel-2 L1C image from 16.04.2020 bands 12,11,4 - one click to enlarge

Geological map of Satsuma Iwo Jima - Doc. Geological Survey of Japan / GVP

Geological map of Satsuma Iwo Jima - Doc. Geological Survey of Japan / GVP

An eruption occurred at 6:09 am on April 29 at the Iodake crater of Satsuma Iō-jima (30 ° 47 ′ 27 ″ N, 130 ° 17 ′ 46 ″ E). It continued until 6:50 a.m. The height of the gas and ash plume is 1000 meters above the edge of the crater. The ashes should fall to the north of the crater.

The last eruption occurred on Satsuma Iō-jima in November 2019.

The inclinometer data near Mount Iodake did not show any significant change due to volcanic activity.

Therefore, it is unlikely that a large-scale eruption will occur at this time.

Currently, Satsuma Iō-jima is at eruption alert level 2 (regulation around the crater).

Satsuma Iwo Jima - photo archive GVP / JMA 03.22.2019

Satsuma Iwo Jima - photo archive GVP / JMA 03.22.2019

The Kikai caldera (red dotted outline) and the 2 islands located on its northern edge, Satsuma Iwo Jima and Take-shima - Courtesy of the Geological Survey of Japan / GVP

The Kikai caldera (red dotted outline) and the 2 islands located on its northern edge, Satsuma Iwo Jima and Take-shima - Courtesy of the Geological Survey of Japan / GVP

Kikai is a 19 km wide submerged caldera located near the northern tip of the Ryukyu Islands, south of Kyushu. It was the source of one of the largest Holocene eruptions in the world around 6,300 years ago, when pyroclastic rhyolitic flows crossed the sea for a total distance of 100 km to the south of Kyushu , and ash falls reached the island of Hokkaido, in the north of Japan.

Post-caldera eruptions formed the Iodake lava dome and the Inamuradake slag cone, as well as underwater lava domes. Historical eruptions have occurred at or near Satsuma-Iojima (also known as Tokara-Iojima), a small 3 x 6 km island that forms part of the northwest edge of the caldera.

 

Sources:

- JMA / Satsuma Iwo Jima - Explanatory information 07:30 am, April 29, Reiwa 2 Fukuoka District Weather Observatory / Kagoshima Local Weather Observatory

- Global Volcanism Program - Kikai - link

Ebeko - Ash plume of 04.28.2020 - photo Kotenko Leonid / IVS FEB RAS KVERT

Ebeko - Ash plume of 04.28.2020 - photo Kotenko Leonid / IVS FEB RAS KVERT

A moderate eruptive activity continues at Ebeko volcano, in the Kuril Islands.

On April 28, a stronger explosion occurred, observed from Severo-Kurilsk by Leonid Kotenko from the local volcanic observatory. This Vulcanian explosion produced a plume of ash rising 2,000 meters above the volcano, then drifting to the southeast. VAAC Tokyo has estimated the height of the plume at 3,600 meters asl., corresponding.

On April 30, the KVERT reports an explosion accompanied by an ash plume at 2,000 meters asl. , drifting east from the volcano.

Aviation code remains orange, with the continuation of this activity which may affect low-level flights and Severo-Kurilsk airport

 

Sources: KVERT & VAAC Tokyo
 

Popocatépetl - the exhalation of 04.29.2020 at 07.46 am, with its gray plume which contrasts with the white of the snowy summit - webcamsdeMexico

Popocatépetl - the exhalation of 04.29.2020 at 07.46 am, with its gray plume which contrasts with the white of the snowy summit - webcamsdeMexico

In the past 24 hours, using the Popocatépetl volcano monitoring system, 52 exhalations have been identified, accompanied by water vapor, gas and slight amounts of ash dispersed towards the southeast sector (SE) .

Similarly, 908 minutes of tremor of low and medium amplitude were recorded.

At the time of this report, there is a partial visibility, however in the morning a constant emission was observed in the southeast direction.

 

Cenapred urges NOT to get close to the volcano and especially the crater, because of the danger involved in the fall of ballistic fragments and, in the event of heavy rain, to move away from the bottom of the ravines because of the danger of mud and rubble.

The Popocatépetl volcanic alert remains at Amarillo Fase 2.

 

Sources: Cenapred and webcams from Mexico

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