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Two explosions as Nicaragua’s San Cristóbal clears its throat 5 July 2010

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Dos grandes “eructos” de volcán San Cristóbal‘ says the headline in Nicaragua’s El Nuevo Diario newspaper: ‘two big “belches” from San Cristóbal volcano’. The eructations in question happened on Friday afternoon, 2 July 2010: two explosions from the summit crater at about 13:05 and 13:10 ejected pyroclastic material, ‘including rocks with a diameter of up to ten metres’, which caused fires in nearby grasslands. A ‘mushroom cloud’ of ash was produced by the second explosion, and light ashfall occurred in villages NW of the volcano. No damage or injuries were reported. An emergency plan was activated for the areas around the volcano, but there were no further signs of activity over the weekend. The Instituto Nicaragüense de Estudios Territoriales (INETER) described Friday’s activity as ‘normal degassing’.

News
Dos grandes “eructos” de volcán San CristóbalEl Nuevo Diario, 4 July 2010

Information
Global Volcanism Program: San Cristóbal – summary information for San Cristóbal (1404-02=)
Instituto Nicaragüense de Estudios Territoriales – INETER main page

The Volcanism Blog

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San Cristóbal’s ‘abnormal’ activity causes concern 5 October 2009

Posted by admin in activity reports, natural hazards, Nicaragua, San Cristóbal.
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‘The steady expulsion of gas and ash’ at San Cristóbal volcano in Nicaragua is causing concern for the surrounding population and the civil defence authorities, reports the Nicaraguan paper El Nuevo Diario: the volcano ‘has had three months of abnormal activity, although sometimes its behaviour is relatively calm’.

The inhabitants of communities affected by the volcano’s emissions – Chichigalpa, Posoltega, Chinandega and El Viejo – have expressed unease at the consequences for their health, and the local government has warned that the ‘fumes and ash could have dangerous consequences for the population’. The Instituto Nicaragüense de Estudios Territoriales (INETER) is constantly monitoring the volcano, which last erupted, on a small scale, a month ago.

News
Sigue actividad de fumarolas en el San CristóbalEl Nuevo Diario, 4 October 2009

Information
Global Volcanism Program: San Cristóbal – summary information for San Cristóbal (1404-02=)
Instituto Nicaragüense de Estudios Territoriales – INETER main page
INETER Comunicados Oficiales – INETER volcano bulletins (not up to date)

The Volcanism Blog

Eruption at San Cristóbal, Nicaragua 7 September 2009

Posted by admin in activity reports, eruptions, Nicaragua, San Cristóbal.
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The northernmost of Nicaragua’s active volcanoes, San Cristóbal, erupted yesterday. El Nuevo Diario reports that ‘eight explosions with emissions of brown ash and gas’ took place on Sunday afternoon. The explosions caused alarm, and an alert was issued for surrounding districts by the national civil defence service, but there are no reports of casualties or significant disruption. The local civil defense chief reported that the plume produced by the initial explosion reached a height of 700 metres above the crater, but the Instituto Nicaragüense de Estudios Territoriales (INETER) is quoted as reporting a height of 200 metres:

A statement from the Instituto Nicaragüense de Estudios Territoriales reports that at 1:50 this afternoon San Cristóbal volcano produced explosions of gas and ashes. The first explosion was detected by the seismic station located on the south-west slope of this volcano, and generated a column that reached an approximate altitude of 200 metres, remaining static because of the absence of wind. There then were four explosions of lesser intensity. According to reports from Defensa Civil personnel in the communities around the volcano, the activity continued until approximately 2:40 in the afternoon.

The INETER statement quoted by El Nuevo Diario does not seem as yet to be available on the volcanology section of the INETER website.

Washington VAAC reported ash at FL280 (i.e. 28000 feet/8500 metres altitude) following the eruption yesterday. The latest Washington ash advisories report no emissions.

Regular, relatively small-scale explosive eruptions are characteristic of San Cristóbal, which last erupted in November 2008. By the way, the Associated Press report wrongly states that the last eruption was in 2006. In fact there was a signficant VEI=2 eruption lasting from November 2005 to May 2006, then two eruptions in 2008, in June and November. It isn’t just AP that gets this wrong, however: Nicaragua’s La Prensa didn’t notice the 2008 eruptions either, and Univisión is busy headlining ‘tres años de inactividad’ when it should be ‘menos de un año de inactividad’.

News
8 explosiones en el San CristóbalEl Nuevo Diario, 6 September 2009
Volcán de Nicaragua lanza arena luego de tres años de inactividad – Univisión, 6 September 2009
Ofrece espectáculo la explosión de un volcán – Milenio.com, 6 September 2009
Nicaragua’s San Cristobal volcano spews ashes, gas – Associated Press, 7 September 2009
San Cristóbal lanza humo y arenaLa Prensa, 7 September 2009

Information
Global Volcanism Program: San Cristóbal – summary information for San Cristóbal (1404-02=)
Instituto Nicaragüense de Estudios Territoriales – INETER main page
INETER Comunicados Oficiales – INETER volcano bulletins (not up to date)

The Volcanism Blog

Eruptive activity at San Cristóbal, Nicaragua 22 November 2008

Posted by admin in activity reports, eruptions, Nicaragua, San Cristóbal.
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Yesterday San Cristóbal volcano in Nicaragua was reported to be showing ‘slightly elevated eruptive activity’, with ‘small explosions’ in its crater and earthquakes with magnitudes between 3.5 and 4.0. Nicaragua’s volcanological authority, INETER, describes this activity as ‘a normal part of the volcano’s behaviour in recent years’ which ‘at the moment poses no imminent danger to the population’.

A report in Nicaragua’s El Nuevo Diario says that the explosions ‘hurled ash and volcanic gases’ at towns and villages south of the volcano. There are no reports of damage or injuries, however.

Elevated seismicity is reported to have been registered at San Cristóbal for the last week.

News
Erupción en volcán San Cristóbal en noroeste de NicaraguaEl Nuevo Diario, 21 November 2008
El volcán San Cristóbal de Nicaragua registra pequeñas explosiones en cráterABC Digital, 22 November 2008
Lanza ceniza y humo volcan San Cristobal en NicaraguaEl Financiero, 22 November 2008
Volcano erupts in Nicaragua with small quakes – Associated Press, 22 November 2008

Information
Global Volcanism Program: San Cristóbal – information about San Cristóbal (1404-02=)
Instituto Nicaragüense de Estudios Territoriales – INETER main page
INETER Comunicados Oficiales – INETER volcano bulletins

The Volcanism Blog