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Santa Ana volcano (El Salvador) - Smithsonian / USGS Weekly Volcanic Activity Report for 5 October-11 October 2005 (Continuing Activity)

Wed, 5 Oct 2005, 06:00
06:00 AM | BY: VN
During 5-11 October, small explosions, degassing, and low-to-moderate seismicity occurred at Santa Ana. Inclement weather during much of the report period prohibited ground and satellite observations and sulfur-dioxide measurements. During an aerial inspection of the volcano on 11 October, no changes were observed at the crater.
Around the 11th, sulfur-dioxide measurements were at 600-700 metric tons per day. SNET noted that eruptive activity could continue at the volcano and an eruption similar to, or smaller than, the October 1 eruption could occur in the future. The Alert Level within a 5-km radius around the volcano's central crater was at Red, the highest level.

Source: Servicio Nacional de Estudios Territoriales (SNET)
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From: Global Volcanism Program, 2005. Report on Santa Ana. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 5 October-11 October 2005. Smithsonian Institution and US Geological Survey.

Previous news

Wed, 28 Sep 2005, 06:00

Santa Ana volcano (El Salvador) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 September-4 October 2005 (New Activity / Unrest)

SNET reported that a sudden eruption at Santa Ana (also called Ilamatepec) on 1 October around 0820 produced an ash-and-gas plume to a height of ~10 km above the volcano (or 40,600 ft a.s.l.). According to the Washington VAAC, ash was visible on satellite imagery at a height of ~14 km (46,000 ft) a.s.l. Ash fell in towns W of the volcano, including in Naranjos, Nahuizalco, Juayúa, Ahuachapán, and La Hachadura. ... Read all
Wed, 21 Sep 2005, 06:00

Santa Ana volcano (El Salvador) - Smithsonian / USGS Weekly Volcanic Activity Report for 21 September-27 September 2005 (Continuing Activity)

During 21-26 September, seismicity and gas emissions were above normal levels at Santa Ana as they had been since 27 July. Microseismicity remained at relatively high levels. During the report period, gas plumes rose to a maximum height of ~1 km above the volcano (or 11,000 ft a.s.l.) on 26 September. ... Read all
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Santa Ana volcano
stratovolcano 2381 m / 7,812 ft
El Salvador, 13.85°N / -89.63°W
Current status: normal or dormant (1 out of 5) Santa Ana volcano eruptions:
2005, 1920, 1904, 1884, 1882(?), 1880, 1879, 1878(?), 1874, 1734, 1722, 1621(?), 1576, ?1570, 1524, 1521, 1520(?)
Typical eruption style
explosive
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