- Start
- Aug 27, 188390% CONFIDENCEfrom the source
Krakatoa Explodes and Is Heard 4,800 km Away
- Krakatoa erupted from 19 May to 21 October 1883; the climactic explosions of 27 August destroyed over 70% of the island, which collapsed into a caldera. [S]
- The 27 August eruption is rated VEI 6, and the third explosion that day, at 10:02 a.m., remains the loudest sound ever recorded. [S]
- It was heard 3,110 km away in Perth and 4,800 km away near Mauritius, and the acoustic pressure wave circled the globe more than three times. [S]
- At least 36,417 deaths are attributed to the eruption and the tsunamis it generated. [S]
- The Smithsonian Global Volcanism Program records Krakatau's eruptive history, including the 1883 caldera-forming event. [1]
References 290% CONFIDENCE
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%en.wikipedia.org/wiki/1883_eruption_of_Krakatoaen.wikipedia.org· Posted Sep 21, 2026· Starts Aug 27, 1883 ✓· 50% of score
The source names the day and the hour of the largest blast: "On 27 August, the island had its most significant eruption ... the third explosion of that day, that occurred at 10:02 a.m., remains the loudest-known sound in history."
- [2]90%Global Volcanism Program | Krakatauvolcano.si.edu· Added Sep 21, 2026· 50% of score
The Smithsonian's eruption database is the standing authority on Krakatau's identity and eruptive record.[1]
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