Cilacap

Earthquakes near Cilacap through history

From 1900 to October 19, 2026, USGS recorded 5 earthquakes of magnitude 6 or more within 100 km of Cilacap, or 200 km for magnitude 7 and above. The strongest was a magnitude 7.4 on July 23, 1943 (87 km SSW of Srandakan, Indonesia).

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The last 30 days · as of

USGS recorded no earthquake of magnitude 4.5 or more within 100 km of Cilacap in the last 30 days.

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What the record holds

It was also the deadliest: NOAA records 213 deaths for it. NOAA’s list of significant earthquakes has 14 here, back to 1840. NOAA records deaths in 7 of the events here, 1,087 in all. The latest on NOAA’s list is a magnitude 4.5 on April 18, 2018 (24 km SSE of Buaran, Indonesia). NOAA’s record here begins on January 4, 1840 with an earthquake (Java: Purworejo). 6 of the 14 significant earthquakes NOAA lists here came before 1927. NOAA lists 2 tsunamis from elsewhere that reached the coast within 100 km of Cilacap with deaths or a metre of water or more. The highest water NOAA records here was 20.9 m, on July 17, 2006. The deadliest here came on July 17, 2006 from a magnitude 7.7 earthquake (South Of Java): NOAA’s runup records count 908 deaths within 100 km of Cilacap.

The events

  • April 18, 2018Earthquake · M 4.524 km SSE of Buaran, Indonesia · 3 deaths (NOAA)USGS · NOAA NCEI
  • September 2, 2009Earthquake · M 7.066 km SSW of Banjar, Indonesia · 81 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
  • July 17, 2006Tsunami · 20.9 m hereSouth Of Java · 908 deaths here (NOAA)NOAA NCEI · Wikipedia
  • July 23, 1943Earthquake · M 7.487 km SSW of Srandakan, Indonesia · 213 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
  • January 4, 1840Earthquake · M 7.0 (est.)Java: PurworejoNOAA NCEI

Good to know

  • An event counts for Cilacap when it began within 100 km of its centre, or 200 km for an earthquake of magnitude 7 or more. Damage can reach further.
  • USGS counts here start at magnitude 6: the catalogue’s smaller quakes thin out going back, where few instruments listened.
  • NOAA lists significant events only: earthquakes that killed, did about $1 million of damage, reached magnitude 7.5 or intensity X, or raised a tsunami, and eruptions and tsunamis by like measures. Magnitudes before 1900 are its estimates from written accounts.
  • Deaths are NOAA’s total for each event, wherever people died, its tsunami and fires included. A tsunami counts the dead its runup records give for this place: NOAA’s total for a tsunami includes its source quake’s.
  • A tsunami from elsewhere counts where one of its runups killed or rose a metre or more.
  • Counted to October 19, 2026, as is the map. The last 30 days ask USGS again.

How the layers work, where their data comes from and what they can’t tell you: Earthquakes, live, The world through history

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