Overall Green Volcanic eruption for Merapi
in Indonesia

Event summary

GREEN alert: The Merapi Volcanic eruption may have a low humanitarian impact, based on the magnitude of the eruption, the exposed population and its coping capacity..

GDACS ID VO 1000062
Name: Merapi (263250)
Lat/Lon: -7.54 , 110.45
Event Date: 12 Mar 2023 UTC
Exposed Population 30km: About 4440000 people within 30km
Exposed Population 100km: About 24400000 people within 100km
Max Volc. Explosivity Index VEI: 4
Population Exposure Index PEI: 7
Inserted at: 13 Mar 2023 07:27 UTC

GDACS Score

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Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Indonesia - Volcanic eruption (ECHO 13 Mar 2023)Mon, 13 Mar 2023 11:20

  • On 11 March, Mount Merapi, located between Central Java Province and the Special Region of Yogyakarta, increased its volcanic activity (still ongoing) with pyroclastic and lava flows that descended mostly into the southwestern flank from the summit.
  • Following the eruption, several villages located in the Regencies of Boyolali and Magelang have been affected by volcanic ash but there have been no reports of significant humanitarian impact.
  • National authorities issued a 7 km potential danger zone from the crater, the potential hazard is in the form of pyroclastic flows and lava flows through the south-southwest sector including the Boyong River for a maximum of 5 km, the Bedog River, Krasak, Bebeng for a maximum of 7 km and through the southeastern sector that includes the Woro River for a maximum of 3 km and the Gendol River for 5 km. 
Detailed event map. European Union, 2026. 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 Merapi report has been published on 08 Mar 2023 08:06.
BPPTKG reported that the eruption at Merapi (on Java) continued during 24 February-2 March and seismicity remained at high levels. The SW lava dome produced two lava avalanches that traveled as far as 1 km down the SW flank (upstream in the Bebeng and Boyong drainages). No significant morphological changes to the central and SW lava domes were evident in webcam images. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 3-7 km away from the summit based on location. Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)
See the detail here

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), INGV (2), DesInventar (1), WMO (1), INFORM (2), (1), JSR (1),