Overblog
Editer l'article Suivre ce blog Administration + Créer mon blog

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 : #Actualités volcaniques
Kilauea East rift zone - a new lava flow on the old a'a flow always active - photo Paradise helicopters

Kilauea East rift zone - a new lava flow on the old a'a flow always active - photo Paradise helicopters

In the eastern rift zone of Kilauea, fissure 8 continues to emit lava in the perched channel. The height of the cone decreased from 180 to 120 feet ... a significant difference, parts of the cone settling while others collapse.

The lava inlet at sea in Ahalanui has slowed, but continues towards Pohoiki, and Isaac Hale Beach, which it could reach this weekend. What seems worrying is the rapid progression of a flow on an old a'a flow always active.
 

Kilauea East rift zone - a new lava flow on the old a'a flow always active - photo Bruce Omori

Kilauea East rift zone - a new lava flow on the old a'a flow always active - photo Bruce Omori

At the top, a collapse occurred on July 19 at 16:33 HST, with an energy equivalent to that of an earthquake of M5,2.

Kilauea summit - just after the collapse of 19.07.2018 / 16:33 HST - USGS photo

Kilauea summit - just after the collapse of 19.07.2018 / 16:33 HST - USGS photo

Emissions of sulfur dioxide from the East Rift Zone remain impressive. The total mass of SO2 detected by the NASP NPP OMPS satellite since early May reaches more than one million tonnes (1 Tg), according to a communication by Simon Carn.

Sources: HVO-USGS, Bruce Omori, Mick Kalber, Simon Carn

Kilauea summit -  sulfur dioxide emissions on 15.07.2018 / 11:37 pm - Aura IMO satellite

Kilauea summit - sulfur dioxide emissions on 15.07.2018 / 11:37 pm - Aura IMO satellite

In Sierra Negra, activity remains unchanged, at a superficial and high internal level.

During the last measurement period, 18 to 19 July at 11am, the number of VT earthquakes decreased, with 39 events; the number of LP earthquakes is 11.

The gas emissions are at least 1,800 meters above sea level, and go to the WNW.

Nighttime glow is observed at the emission points, and on the lava flows.

Source: IGEPN

Sierra Negra - thermal anomalies on 20.07.2018 / 5:05 - Doc.Mirova Modis

Sierra Negra - thermal anomalies on 20.07.2018 / 5:05 - Doc.Mirova Modis

In Villarica, POVI reports the presence of ash at the bottom of the steam plume emitted on July 18th.

The ESA satellite measured the same day a thermal anomaly at the top, the highest since December 10, 2017 ... validated by the photo taken on July 19.

Source: Werner Keller / POVI

 Villarica - steam and ash emission on 18.07.2018 / 10:21 - 10:34 - POVI photos

Villarica - steam and ash emission on 18.07.2018 / 10:21 - 10:34 - POVI photos

Villarica - summit glow on 19.07.2018 / 18h43 - photo POVI

Villarica - summit glow on 19.07.2018 / 18h43 - photo POVI

At Popocatépetl, the last 24 hours were marked with 51 exhalations of steam and gas, and an explosion on July 19 at 8:31.

From around 9:30 pm, Popocatépetl presented a series of small explosions, accompanied by light ash emissions in a westerly direction.

Alert level remains unchanged: Amarillo Fase 2

Source: Cenapred
 

Popocatépetl - 19.07.2018 / 21h30 approx - earthquake and explosion - Doc.Cenapred

Popocatépetl - 19.07.2018 / 21h30 approx - earthquake and explosion - Doc.Cenapred

Commenter cet article

Articles récents

Hébergé par Overblog