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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 : #Actualités volcaniques
 Kilauea East rift zone - lava comes out in large quantities from the spatter cone established on the fissure 8 - photo Bruce Omori 11.07.2018

Kilauea East rift zone - lava comes out in large quantities from the spatter cone established on the fissure 8 - photo Bruce Omori 11.07.2018

At Kilauea, the fissure 8 still emits large amounts of lava into the perched channel to the northeast of the vent. Around 8:30 am to 9:00 am on July 11, the upper channel overflowed between the cone and Pohoiki road, generating lava lobes advancing a short distance but threatening homes.

 

Kilauea East rift area - channeled flow, into Leilani Estates sb, produces a black pyrocumulus - photo Bruce Omori 11.07.2018

Kilauea East rift area - channeled flow, into Leilani Estates sb, produces a black pyrocumulus - photo Bruce Omori 11.07.2018

A new blockage occurred near the Kapoho crater, and most of the lava flow began to flow south along the west side of the Kapoho crater.

A massivea'a lava flow front has advanced to Ahalanui Beach Park and Kua O Ka Lā Charter School.

Only other active crack, the fissure 22 emits a weak spattering.

Kilauea East rift area - new path taken by lava flow west of Kapoho crater ( flow from bottom of photo to ocean) - photo Bruce Omori 11.07.2018 / 5:45

Kilauea East rift area - new path taken by lava flow west of Kapoho crater ( flow from bottom of photo to ocean) - photo Bruce Omori 11.07.2018 / 5:45

 Kilauea East rift area - map of the active flows at 11.07.2018 / 13h loc. - Doc. USGS-HVO

Kilauea East rift area - map of the active flows at 11.07.2018 / 13h loc. - Doc. USGS-HVO

At the top, a collapse / explosion occurred under the caldera on July 11 at 5:46 HST, with energy equivalent to that of an earthquake of M5,3. The plume produced by this episode contained little ash.

Sources: HVO-USGS and Bruce Omori.

Kilauea summit - 11.07.2018 / 5:48 - Steam tainted with a bit of ash after the collapse / explosion - photo Don Swanson via USGS.

Kilauea summit - 11.07.2018 / 5:48 - Steam tainted with a bit of ash after the collapse / explosion - photo Don Swanson via USGS.

In Sierra Negra / Galapagos, the activity shows little change.

There is a large gas and ash plume up to 2,100 meters asl. towards the west. A lava flow is corroborated by a thermal anomaly increasing during the day 11.07, with around 15:55 a VRP of 10583 MW.

At the seismicity level, 158 VT earthquakes, 6 LP earthquakes and emission tremor are recorded; 20 earthquakes are located at a depth of less than 9 km; the largest magnitude earthquake, M3.6, occurred at 22:02 GMT on the western flank of the volcano.

The alert level remains orange.

Source: IGEPN

Sierra Negra - Lava Fountains, Plume of Gas / ash and Flooding Arrival - Photo 2018.07.11 by Ben and Matt Tanzer / Instagram

Sierra Negra - Lava Fountains, Plume of Gas / ash and Flooding Arrival - Photo 2018.07.11 by Ben and Matt Tanzer / Instagram

 Sierra Negra - image Sentinel 2 Hub 11.07.2018 - a click to enlarge

Sierra Negra - image Sentinel 2 Hub 11.07.2018 - a click to enlarge

Sierra Negra - thermal anomalies on 11.07.2018 / 15h55 - Doc. Mirova Modis

Sierra Negra - thermal anomalies on 11.07.2018 / 15h55 - Doc. Mirova Modis

Sierra Negra - lava fountains, gas plume and sinking of the sea - photo 2018.07.11 Freddy Muller aboard the Silversea

Sierra Negra - lava fountains, gas plume and sinking of the sea - photo 2018.07.11 Freddy Muller aboard the Silversea

Sierra Negra - Volcanic Ash Advisory for 11 and 12.07.2018 - VAAC Washington

Sierra Negra - Volcanic Ash Advisory for 11 and 12.07.2018 - VAAC Washington

In Guatemala, the Pacaya presents Strombolian explosions with projections 25-50 meters above the Mackenney crater.

A lava flow, 350 m. approximately goes to the side of San Vicente Pacaya.

Few images due to bad weather conditions.

Sources: Insivumeh and Conred

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