The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
San Cristobal volcano, also known as El Viejo, is the highest and one of the most active volcanoes in Nicaragua. It is located near the northwest corner of the country near the city of Chinandega, 110 km WSW of the capital Managua.
San Cristobal has had frequent small to medium-sized ash eruptions reported since the 16th century. When first observed by the Spanish in 1528, the volcano was in strong eruption and was described as sending "smoke" during the day and "flames" at night.
San Cristobal volcano (Nicaragua): new ash emissions
Wednesday Dec 26, 2012 12:29 PM | BY: T
This morning's seismic signal (CRIN station, INETER) showing continuous tremor
Seismic signal from the 12 hours before (second half of 25 Dec GMT, CRIN station, INETER)
New eruptive activity has been reported from San Cristobal volcano in Nicaragua. It appears that small ash emissions started late in the evening of 25 Dec (local time). Plumes reach 8,000 ft (2.4 km) altitude VAAC Washington reports.
The reported activity correlates to a marked increase in seismicity and the appearance of a strong continuous tremor signal.
Seismic activity at the volcano seems to be decreasing, although a few earthquakes still occur. INETER has not published any reports since 16 Sep, suggesting that not much activity is happening. [more]
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