Overall Green alert Volcanic eruption for Sangay
in Ecuador

Event summary

Volcanic eruption Sangay can have a low humanitarian impact based on the exposed population and vulnerability.

GDACS ID VO 1000017
Name: Sangay
Lat/Lon: -2.005 , -78.341
Event Date: 12 Mar 2021 00:00 UTC
Exposed Population 30km: About 19000 people within 30km
Exposed Population 100km: About 1530000 people within 100km
Max Volc. Explosivity Index VEI: 3
Population Exposure Index PEI: 3
Inserted at: 12 Mar 2021 07:27 UTC


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Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Ecuador - Volcanic eruption (ECHO 12 Mar 2021)Fri, 12 Mar 2021 14:43

  • The activity of Sangay volcano, located in central Ecuador, is increasing over the past few days. On 11 March, a pyroclastic flow descended trough the south-east flank (río Volcán) and an ash column up to 12,5 km above the sea level moved north-westward. 
  • According to the Geophysical Institute of Ecuador (IGEPN) and media, widespread ashfall reached several provinces of Chimborazo, particularly Riobamba City, located 50 km north-west of the volcano.
  • People have been advised not to stay close to the Volcán and Upano rivers due to lahar risks. Moderate to heavy rain is forecast over most parts of Ecuador. About 133,306 people have been severely affected (29,772 households) and 44,574 ha of agricultural land have been seriously damaged.
Detailed event map. European Union, 2021. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

The Smithsonian/USGS Weekly Volcanic Activity Report provides information about global volcanism on a weekly basis. Latest Sangay report has been published on 10 Mar 2021 08:53.
IG reported a high level of activity at Sangay during 3-9 March. Seismicity was characterized by daily explosions, long-period earthquakes, and signals indicating emissions. Weather clouds often prevented visual observations of the volcano, but satellite and webcam images recorded daily ash plumes. Ash plumes were notable during 5-6 March and impacted communities downwind with ashfall. According to the Washington VAAC ash plumes rose 5.8-12.2 km (19,000-40,000 ft) a.s.l. and drifted 170-370 km SW, W, and NW; ash at altitudes of 5.8-8.2 km (19,000-27,000 ft) a.s.l. drifted 185 km E. During 5-6 March ashfall was reported in Alfredo Baquerizo Moreno (132 km W), but fell more significantly in Alaus? (61 km WSW), Chunchi (73 km SW), Cumand? (90 km WSW), Guamote (42 km WNW), Pallatanga (70 km W), Milagro (140 km W), San Jacinto de Yaguachi (150 km W), Samborondon (170 km W), Daule (180 km W), and Dur?n (168 km W). SNGRE reported that the ashfall affected a total of 108,457 people (23,750 families) as well as numerous crops and animals; they distributed volcano-related aid kits to impacted populations. Ashfall continued to impact multiple communities during 6-7 March. Ash fell in Guayaquil (175 km W), General Antonio Elizalde (97 km WSW), Sim?n Bol?var, Milagro (140 km W), San Jacinto de Yaguachi (150 km W), El Triunfo (125 km WSW), Daule, Sambor?ndon (170 km W), Coronel Marceli?o Maridue?a (120 km WSW), Dur?n, Naranjito, Alfredo Baquerizo Moreno, Playas (240 km WSW), Guamote (40 km WNW), Alaus? (60 km SW), Pallatanga (70 km W), Chunch? (72 km SW), and Colta (55 km NW). Sources: Instituto Geof?sico-Escuela Polit?cnica Nacional (IG) ,Servicio Nacional de Gesti?n de Riesgos y Emergencias (SNGRE)
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Latest media headlines

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (31), (1), INGV (2), DesInventar (1), WMO (1), INFORM (2),