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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
 Semeru - small plume of 04.05.2020 / 06:14 WIB - PVMBG webcam

Semeru - small plume of 04.05.2020 / 06:14 WIB - PVMBG webcam

VAAC Darwin reports an eruption in Semeru, on Java, accompanied by a plume observed 400 meters above the summit on May 3, 2020.

At the seismicity level, Magma Indonesia informs for this May 3:

- 33 eruption earthquakes with an amplitude of 10-21 mm, and the duration of the earthquake 60-102 seconds.

- 2 avalanche earthquakes with an amplitude of 3-6 mm and an earthquake duration of 50-80 seconds. The sliding distance and the direction of fall are not observed.

- 21 blast earthquakes with an amplitude of 2 to 9 mm and an earthquake duration of 40 to 75 seconds.

- A Harmonic earthquake with an amplitude of 4 mm and an earthquake duration of 55 seconds.

- 4 distant tectonic earthquakes with an amplitude of 19-30 mm, S-P 11-21 seconds and an earthquake duration of 30-90 seconds.

The aviation code is orange and the activity level is 2 / waspada.

 

Sources: PVMBG, Magma Indonesia, and VAAC Darwin.

Ruapehu,  Te Wai ā-moe crate lake - photo GNS 04.05.2020

Ruapehu, Te Wai ā-moe crate lake - photo GNS 04.05.2020

An expected cooling trend for the Ruapehu crater lake, Te Wai ā-moe , is now confirmed. The lake reached a maximum temperature of 42 ° C in early April and is currently at 35 ° C.

Today, the intensity of the volcanic tremor is low, as it has been in the past month. After a moderate force peak in early March, the tremor decreased slowly, almost parallel to the cooling trend of the lake. Energy input modeling indicates a weak but continuous heat flow in the lake, indicating that the underlying ventilation area is open to upward flows of volcanic gases and hydrothermal fluids

Last week, GNS volcanologists briefly visited the lake to maintain monitoring equipment. They reported that the lake was a uniform gray color with only a few surface layers and no obvious upwelling. At that time, the water level had dropped to about 30 cm below the overflow, but after the rain this weekend, the lake again overflows into the upper reaches of the Whangaehu River.

The volcanic alert level remains at level 1. There is no change in the aviation color code of green.

 

Source: GNS Science

Mayotte - announcement of future MAYOBS campaigns in May 2020.
Mayotte - announcement of future MAYOBS campaigns in May 2020.

Mayotte - announcement of future MAYOBS campaigns in May 2020.

As part of the actions carried out by the public authorities, to better understand the seismic-volcanic phenomenon which affects Mayotte since May 2018, two new campaigns at sea are organized off the island in early May 2020 by the VOlcanological and SIsmological surveillance network de Mayotte (Revosima) announces the prefecture of Mayotte.

The objectives of these two missions are:

- for MAYOBS13-1 on board the BSAOM Champlain, to recover data from seismic seabed stations and ensure their maintenance

- and for MAYOBS 13-2 on board the ship Gauss de Fugro, to establish new underwater maps to monitor seismic-volcanic activity at the bottom of the sea.

 

Source: Prefecture of Mayotte and IPGP / REVOSIMA

Montserrat - Plymouth Pentecotist church - photo MVO 03.2020

Montserrat - Plymouth Pentecotist church - photo MVO 03.2020

Today at 7:52 p.m. on France Ô Tv: Montserrat, the Pompeii of the Caribbean

 

Montserrat is an English island in the Caribbean. In 1995, its volcano, the Soufriere Hills, erupted for several months and devastated the capital, Plymouth. Since then, the island has been cut in two with, to the south, an area whose access is regulated and a north which is developing to accommodate new housing and administrations. Almost all of the people in the area where the disaster occurred have left the island. The volcano is still active. A team of around twenty scientists constantly monitors it. Almost twenty-five years later, the capital is still covered in ashes. (TV program)

Etna volcano activity time lapse 02-05-2020

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