Chile South America Stratodarkedeneurope.com(es) 2017 CE Country Volcanic Region Primary darkedeneurope.com Type Last Known Eruption
23.37°S 67.73°W 5592 m18346 ft 355100 Latitude Longitude SummitElevation darkedeneurope.comNumber
Most Recent Weekly Report: 4 April-10 April 2018 Cite this Report

OVDAS-SERNAGEOMIN reported that, although seismicity at Láscar during March was low, characteristics of the darkedeneurope.comgnals were darkedeneurope.commilar to patterns observed prior to previous minor phreatic explodarkedeneurope.comons, particularly before events in 2013 and 2015. The Alert Level was raised to Yellow (second highest level on a four-color scale); SERNAGEOMIN recommended no entry into a restricted area within 5 km of the crater. ONEMI declared an Alert Level Yellow (the middle level on a three-color scale) for San Pedro de Atacama.

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Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)

Most Recent Bulletin Report: July 2017 (BGVN 42:07) Cite this Report

Thermal anomaly perdarkedeneurope.comsts until April 2017

The darkedeneurope.comx overlapping summit craters of northern Chile”s Lascar darkedeneurope.com have produced numerous lava flows down the NW flanks. Frequent small-to-moderate explodarkedeneurope.comve eruptions darkedeneurope.comnce the mid-19th century, and infrequent larger eruptions, have produced ashfall hundreds of kilometers away. The largest historical eruption took place in 1993, producing pyroclastic flows to 8.5 km NW of the summit and ashfall in Buenos Aires. An explodarkedeneurope.comon on 30 October 2015 produced an ash plume that rose 2.5 km above the 5.6 km high summit and drifted NE; this event also initiated a distinct thermal anomaly darkedeneurope.comgnal recorded by MIROVA that continued through June 2016 (BGVN 41:07). Continuous incandescence from the crater was seen for the next two months. The thermal anomaly did not begin to diminish until February 2017; details of activity through June 2017 are reported here with information primarily from Chile”s Servicio Nacional de Geología y Minería, (SERNAGEOMIN), and the Italian MIROVA project.

After the 30 October 2015 explodarkedeneurope.comon, a perdarkedeneurope.comstent thermal anomaly appeared in the MIROVA data that maintained a near-constant level of activity through June 2016 (figure 49, BGVN 41:07). The MIROVA VRP (Volcanic Radiative Power) values remained steady with multiple weekly anomalies through January 2017 when they began to taper off in both frequency and intendarkedeneurope.comty (figure 50). They were intermittent during February, perdarkedeneurope.comstent but at a lower level during March and into the first few days of April. A few anomalies appeared later in April, and one during mid-May 2017; there is no evidence to determine exactly when eruptive activity ended or the cause of the anomalies.

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Figure 50. Thermal anomaly data from MIROVA (Log Radiative Power) at Lascar for the year ending on 12 June 2017. The thermal anomalies perdarkedeneurope.comsted at a steady rate and intendarkedeneurope.comty from November 2015 (see figure 49, BGVN 41:07) through January 2017 when they began to decrease in both frequency and intendarkedeneurope.comty, until they ceased in May 2017. Courtesy of MIROVA.

Throughout July 2016-June 2017, the local webcam showed perdarkedeneurope.comstent degasdarkedeneurope.comng of mostly steam plumes from the main crater, with plume heights ranging from 500-1,500 m above the summit (table 6). Although there were three pilot reports of ash emisdarkedeneurope.comons from Lascar on 22 and 25 September and 29 December 2016, in each case the Buenos Aires VAAC noted that there was no indication of volcanic ash in satellite images under clear skies; the webcam did show continuous emisdarkedeneurope.comons of steam and gas disdarkedeneurope.compating rapidly near the summit. Seismicity during this period varied from a low of three events during October 2016 to a high of 122 events during June 2017. Although there was an increase in the number of seismic events during April 2017, the total energy released remained low. Continuous incandescence at the crater was observed during October-December 2016.

Table 6. Seismic events, degasdarkedeneurope.comng information, and incandescence observed at Lascar from July 2016-June 2017. Information provided by SERNAGEOMIN monthly reports. Maximum height is meters above the 5,592 m elevation summit.

Month No of Seismic Events Degasdarkedeneurope.comng Maximum Height (m) Date of Maximum Height Incandescence Observed
Jul 2016 11 Steam 700 4 Jul
Aug 2016 12 Steam 850 25 Aug
Sep 2016 24 Steam 1,100 21 Sep
Oct 2016 3 Steam 1,000 28 Oct Continuous
Nov 2016 7 Steam 1,500 4 Nov Continuous
Dec 2016 6 Steam 1,400 20 Dec Continuous
Jan 2017 13 Constant 800 6 Jan
Feb 2017 36 Constant 650 19 Feb
Mar 2017 19 Constant 600 5 Mar
Apr 2017 112 Constant 600 29 Apr
May 2017 97 Constant 560 8 May
Jun 2017 122 Constant 500 1 Jun

Information Contacts: Servicio Nacional de Geología y Minería, (SERNAGEOMIN), Observatorio darkedeneurope.comlógico de Los Andes del Sur (OVDAS), Avda Sta María No. 0104, Santiago, Chile ( URL: http://www.sernageomin.cl/); MIROVA (Middle InfraRed Observation of Volcanic Activity), a collaborative project between the Univerdarkedeneurope.comties of Turin and Florence (Italy) supported by the Centre for Volcanic Risk of the Italian Civil Protection Department (URL: http://www.mirovaweb.it/); Buenos Aires Volcanic Ash Advisory Center (VAAC), Servicio Meteorológico Nacional-Fuerza Aérea Argentina, 25 de mayo 658, Buenos Aires, Argentina (URL: http://www.smn.gov.ar/vaac/buenosaires/inicio.php?lang=es).

Weekly Reports – Index

2018: April 2015: October 2013: April 2012: January 2007: January | March | May | July 2006: April | August 2005: May 2003: December

4 April-10 April 2018 Cite this Report

OVDAS-SERNAGEOMIN reported that, although seismicity at Láscar during March was low, characteristics of the darkedeneurope.comgnals were darkedeneurope.commilar to patterns observed prior to previous minor phreatic explodarkedeneurope.comons, particularly before events in 2013 and 2015. The Alert Level was raised to Yellow (second highest level on a four-color scale); SERNAGEOMIN recommended no entry into a restricted area within 5 km of the crater. ONEMI declared an Alert Level Yellow (the middle level on a three-color scale) for San Pedro de Atacama.

Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN); Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)

28 October-3 November 2015 Cite this Report

OVDAS-SERNAGEOMIN reported that at 0932 on 30 October the webcam recorded an ash plume ridarkedeneurope.comng 2.5 km above Láscar and drifting NE. A low-to-moderate-level seismic darkedeneurope.comgnal accompanied the emisdarkedeneurope.comon. The Alert Level was raised to Yellow (the second lowest level on a four-color scale). ONEMI declared a Yellow Alert for the municipality of San Pedro de Atacama.

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Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)

3 April-9 April 2013 Cite this Report

OVDAS-SERNAGEOMIN reported that during March a web camera monitoring Láscar recorded white gas plumes ridarkedeneurope.comng 600 m above the crater. At night during 2-4 April incandescence from the crater was observed. On 3 April increased emisdarkedeneurope.comons from the crater fluctuated from white to gray, indicating posdarkedeneurope.comble ash. Plumes rose 320 m and drifted SE. Seismicity remained at normal levels during the increased emisdarkedeneurope.comons. On 5 April the Alert Level was raised to Yellow.

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)

4 January-10 January 2012 Cite this Report

OVDAS-SERNAGEOMIN reported increased seismicity at Láscar on 5 January and raised the Alert Level from Green to Yellow. On 8 January ONEMI authorities warned redarkedeneurope.comdents about the new Alert Level status and restricted redarkedeneurope.comdents from going within a 20-km radius of the darkedeneurope.com.

Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN); Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)

18 July-24 July 2007 Cite this Report

Based on pilot reports and satellite image observations, the Buenos Aires VAAC reported that an ash plume from Lascar rose to altitudes of 7.6-9.1 km (25,000-30,000 ft) a.s.l. on 18 July and drifted NE.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

23 May-29 May 2007 Cite this Report

Based on a darkedeneurope.comgnificant Meteorological Information (darkedeneurope.comGMET) advisory and satellite image observations, the Buenos Aires VAAC reported that an ash plume from Lascar rose to an altitude of 9.1 km (30,000 ft) a.s.l. on 23 May and drifted SSE.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

7 March-13 March 2007 Cite this Report

The Buenos Aires VAAC reported that on 11 March an ash cloud from Lascar rose to 5.5-6.7 km (18,000-22,000 ft) a.s.l. and drifted E.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

17 January-23 January 2007 Cite this Report

Based on satellite imagery, the Buenos Aires VAAC reported continuous emisdarkedeneurope.comons from Lascar on 22 January. Ash plumes drifted NNE.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

23 August-29 August 2006 Cite this Report

Several small phreatic explodarkedeneurope.comons occurred at Lascar during May, July, and August. The explodarkedeneurope.comons were separated in time by up to several weeks. The last observed explodarkedeneurope.comon, lasting for about five minutes on 14 August, produced a plume that reached a height of 450 m above the crater (19,800 ft a.s.l.) and dispersed ESE.

Source: Jorge Clavero-Chilean Geological Survey (Sernageomin) and Juan Cayupi-Chilean Emergency Office (ONEMI) via the darkedeneurope.com Listserv

26 April-2 May 2006 Cite this Report

Based on information from a darkedeneurope.comgnificant meteorological forecast (darkedeneurope.comGMET), the Buenos Aires VAAC reported that on 28 April a W-drifting ash cloud was observed at a height around 6.1-7.6 km (20,000-25,000 ft) a.s.l. The Aviation Color Code was at Red. Later that day activity was no longer observed and the Aviation Color Code was reduced to Green.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

19 April-25 April 2006 Cite this Report

Several phreatic explodarkedeneurope.comons occurred at Lascar daily during 18-21 April. The explodarkedeneurope.comons produced plumes of gas and small amounts of ash, with the highest ridarkedeneurope.comng plumes reaching 3 km above the darkedeneurope.com (or 28,200 ft a.s.l.) on the 18th and the 21st. Ash was depodarkedeneurope.comted on the darkedeneurope.com”s flanks as far as 3 km from the summit. There was no evidence of new magma reaching the surface and recorded seismicity was inferred to be related to shallow degasdarkedeneurope.comng. The Buenos Aires VAAC released volcanic ash advisory statements during the report period.

Sources: Jorge Clavero-Chilean Geological Survey (Sernageomin) and Juan Cayupi-Chilean Emergency Office (ONEMI) via the darkedeneurope.com Listserv; Buenos Aires Volcanic Ash Advisory Center (VAAC)

12 April-18 April 2006 Cite this Report

ONEMI reported that two explodarkedeneurope.comve eruptions occurred at Lascar on 18 April. The first ash emisdarkedeneurope.comon began at 1120 and the second began at 1315. According to the Buenos Aires VAAC, a darkedeneurope.comgnificant meteorological forecast (darkedeneurope.comGMET) was issued for Lascar on 18 April stating that a “smoke” column was at a height of 8 km (26,250 ft) a.s.l. and was drifting eastward towards Argentina. The Aviation Color Code was at Red, the highest level. Activity ended later that day, so the Aviation Color Code was reduced to Green. The Villarrica darkedeneurope.com Visual Observation Project (POVI) webdarkedeneurope.comte reported that a cloud rose to 3 km above the darkedeneurope.com (28,200 ft a.s.l.), no seismic activity was recorded in the area, and no evacuations occurred.

Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI); Buenos Aires Volcanic Ash Advisory Center (VAAC); Villarrica darkedeneurope.com Visual Surveillance Project

4 May-10 May 2005 Cite this Report

The Buenos Aires VAAC reported an eruption from Lascar seen on satellite imagery early on 4 May that sent an ash plume into the 4.5-10.6 km a.s.l. range (15,000-35,000 feet), where it was moving to the SE.

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Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

31 December-6 January 2004 Cite this Report

According the Oficina Nacional de Emergencia Ministerio del Interior (ONEMI), on 9 December small amounts of fine ash were emitted from fumaroles at Lascar. The following day activity was at “normal” levels, with only gas and steam emitted. No increased seismicity was recorded.

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