Bristol Island volcano news & activity updates:
Bristol Island volcano (UK): details of lava flows emplaced during the April-July 2016 eruption
Mi, 14. Sep 2016, 12:0512:05 PM | VON: T
Lava flow field on Bristol Island on 22 Sep 2016 (image: Landsat 8 / annotated by Culture Volcan)
The latest eruption of the volcano during April - late July 2016 could only be observed from space. An analysis of images taken before, during and after the eruption allows to see a vast field of fresh lava flows.
Lava flow field on Bristol Island during its eruption on 1 May 2016 (image: Landsat 8 / annotated by Culture Volcan)
The lava flows were erupted from the Mount Surabaya cone, the volcano's most active vent, and covered a large area of the western half of the rectangular-shaped island.
The area occupied by the flows can be estimated to be about 1.7 million square meters, while their thickness remains unknown, and hence, a precise volume estimation is not possible. Visible on satellite images as well are steam vents at the contacts of the hot lava field with the ice and elongated crevasses in the ice sheet west and around the lava flows, created by melt-water draining underneath the ice.
It is unclear whether the lava flows are emplaced on the bedrock (melting the ice sheet away while progressing) or whether they were emplaced on top of the ice (which can be the case if the ice is thick and the flow progresses quickly) and later slowly settles into it.
Links / Quelle:
Links / Quelle:
- Éruption de Bristol Island: quelques détails post éruption (Culture Volcan)
Mo, 8. Aug 2016, 16:21
The eruption on the remote island seems to have come to and end or paused. alles lesen
Do, 21. Jul 2016, 15:59
The eruption on the remote island continues. Recent satellite images show increased ash emissions as well as two dark stripes that likely are newly erupted lava flows to the west and northwest from Mount Sourabaya volcano. ... alles lesen
Sa, 18. Jun 2016, 16:12
The eruption continues, but seems to have lost energy recently: satellite images still show ash plumes drifting from the remote island, but these have been less intense during the past week. ... alles lesen
Mo, 6. Jun 2016, 13:09
Bristol volcano (South Sandwich Islands, UK): activity continues, ash plumes visible on satellite imagery
The eruption continues - Buenos Aires VAAC reports detecting ongoing ash emissions from satellite data. A moderately sized plume can be seen drifting east from the volcano. ... alles lesen
Mi, 1. Jun 2016, 14:39
Eruptive activity continues at the remote volcano and might have become more intense recently. ... alles lesen