Hood volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 12 September-18 September 2001 (New Activity / Unrest)
The USGS Cascades Volcano Observatory reported that a minor earthquake swarm occurred at Mount Hood from 9 September until at least 14 September. About 25 events were detected, with a maximum magnitude of 2.9. The epicenters of the earthquakes were ~8 km SSW of the volcano's summit at depths of 1-7 km.
mer., 12 sept. 2001, 06:0006:00 AM | AUTEUR : VN
These types of swarms occur once or twice per year at Mount Hood.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
From: Global Volcanism Program, 2001. Report on Hood. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 12 September-18 September 2001. Smithsonian Institution and US Geological Survey.
mer., 17 janv. 2001, 06:00
Hood volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 17 January-23 January 2001 (New Activity / Unrest)
The Cascades Volcano Observatory (CVO) reported that during 10-20 January a swarm of 13 earthquakes with magnitudes ranging from 0.2-2.0 occurred in an area about 4-8 km SSE of the summit at a depth of 4-7 km. This activity is not abnormal; Mount Hood averages one to two small swarms a year, with the last swarm occurring in May 2000. The current swarm consisted of fewer and smaller events than is typical, but it may not have yet ended. ... Read all