Santa Ana volcano (El Salvador) - Smithsonian / USGS Weekly Volcanic Activity Report for 31 August-6 September 2005 (Continuing Activity)
During 1-6 September, seismicity and gas emissions were above normal levels at Santa Ana as they had been since 27 July. Tremor continued to be recorded, and on 2 August a cluster of at least eight small earthquakes occurred. The earthquakes were not felt by local residents.
Wed, 31 Aug 2005, 06:0006:00 AM | BY: VN
During the report period, gas plumes rose to ~500 m above the volcano (or 9,400 ft a.s.l.) and the sulfur-dioxide flux was over 1,000 metric tons per day. Satellite imagery from 5 September showed a thermal anomaly at the volcano. Santa Ana remained at Alert Level Yellow Phase 1.
Source: Servicio Nacional de Estudios Territoriales (SNET)
From: Global Volcanism Program, 2005. Report on Santa Ana. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 31 August-6 September 2005. Smithsonian Institution and US Geological Survey.
Wed, 24 Aug 2005, 06:00
Santa Ana volcano (El Salvador) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 August-30 August 2005 (New Activity / Unrest)
SNET reported a significant increase in seismic activity at Santa Ana (also called Ilamatepec) on the night of 27 August. A cluster of 17 volcano-tectonic earthquakes were recorded, with four located S of the volcano. Afterwards, continuous high-frequency tremor was recorded until at least 30 August. ... Read all
Wed, 17 Jan 2001, 06:00
Santa Ana volcano (El Salvador) - Smithsonian / USGS Weekly Volcanic Activity Report for 17 January-23 January 2001 (New Activity / Unrest)
Beginning on 12 January several news reports stated that increased volcanic activity occurred at Santa Ana volcano. The Washington VAAC reported that an eruption occurred at 1800 on 16 January that sent ash to ~3.7 km a.s.l. Local observations by volcanologists revealed that an eruption did not occur and no new lava or magma was in the summit crater. ... Read all