Continuous Lava Flows at Heard Volcano in Southern Indian Ocean, Australia
Two lava flows from Heard volcano visible from space (image: Sentinel 2)
Effusive activity of the volcano continues.
A satellite image from 11 November shows that two lava flows on the south-southwestern and northwestern flank remain active, currently about 500 m long.
Courtesy of volcanodiscovery.com
Volcanic Ash Advisory. Explosive Activity at Sabancaya Volcano in Peru
Photo Illustration
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 24000 ft (7300 m) altitude or flight level 240 and is moving at 15 kts in E direction.
Courtesy of volcanodiscovery.com
Volcanic Alert Level Raised to Level 2 at White Island Volcano in New Zealand
Aerial view of White Island volcano with an ash and gas plume (image: @nzherald/twitter)
GeoNet reported that an observations during the gas flight confirmed the presence of fine ash material in the plume. The fine particles originate from the main steam vent at the back of the crater lake. Initial analyses of the ash particles suggest that it is loose material from around the vent or underlying conduit being carried by the steam and gas emission.
Some of the particles may be carried a few kilometres downwind but are unlikely to reach the mainland. The gas and steam plume may be noticed on the mainland as weak acid rain. While the gas output observed yesterday is higher than recent observations, other monitoring parameters do not show significant changes.
Observations from the flight show there is no substantial change in the location and size of active vents. The rainfall has formed a pool of water on the floor of the 1978/90 Crater, re-forming a shallow lakelet.
During the past week, a small sequence of earthquakes has been located close to the volcano and an increase of volcanic tremor has been recorded.
The main plausible triggers for a sudden eruption with little or no warning remain the collapse of unstable material in an active vent and the possible ingress of water underground onto the shallow magma body.
Courtesy of volcanodiscovery.com
MAGNITUDE 4.6 ST. MARTIN REGION, LEEWARD ISLANDS
Depth: 104 km
Distances: 34 km SW of Marigot, Saint Martin / pop: 5,700 / local time: 16:35:12.2 2020-11-13
34 km SW of Cul de Sac, Sint Maarten / pop: 8,400 / local time: 16:35:12.2 2020-11-13

MAGNITUDE 4.0 ISLAND OF HAWAII, HAWAII, USA
21 km ESE of Waimea, United States / pop: 9,200 / local time: 09:36:11.0 2020-11-13

MAGNITUDE 5.3 OFF COAST OF SINALOA, MEXICO
Depth: 10 km
Distances: 266 km S of Culiacán, Mexico / pop: 675,000 / local time: 12:04:15.5 2020-11-13
163 km SW of Mazatlán, Mexico / pop: 381,000 / local time: 12:04:15.5 2020-11-13

MAGNITUDE 4.7 SOUTHERN IDAHO, YELLOWSTONE, USA
Depth: 15 km
Distances:
116 km NNE of Boise, United States / pop: 145,000 / local time: 03:54:33.3 2020-11-1379 km WSW of Challis, United States / pop: 1,000 / local time: 03:54:33.3 2020-11-13

MAGNITUDE 5.7 MACQUARIE ISLAND REGION
Depth: 10 km
Distances: 1102 km SW of Dunedin, New Zealand / pop: 114,000 / local time: 22:12:46.1 2020-11-13
935 km SSW of Bluff, New Zealand / pop: 1,900 / local time: 22:12:46.1 2020-11-13

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