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1917 Bali earthquake

Earthquake in Indonesia in 1917

Field	Value
title	1917 Bali earthquake
timestamp	1917-01-20 23:11:34
isc-event	913396
anss-url	iscgem913396
map2	{{Location map	Indonesia Bali
lat	-8.492
long	115.198
mark	Bullseye1.png
marksize	40
position	top
width	250
float	right
caption	}}
local-date
local-time	07:11
magnitude	6.6 Ms
depth
location
countries affected	Dutch East Indies, Bali
intensity
PGA
tsunami	Minor
landslide	Many
foreshocks	Yes
casualties	1,500

|isc-event = 913396 |anss-url = iscgem913396 |local-date = |local-time = 07:11 The 1917 Bali earthquake occurred at 07:11 local time on 21 January (23:11 on 20 January UTC). It had an estimated magnitude of 6.6 on the surface-wave magnitude scale and had a maximum perceived intensity of IX (Violent) on the Mercalli intensity scale. It caused widespread damage across Bali, particularly in the south of the island. It triggered many landslides, which caused 80% of the 1,500 casualties.

Tectonic setting

The island of Bali forms part of the Sunda Arc, which formed above the convergent boundary where the Australian plate is subducting beneath the Sunda plate. The rate of convergence across the line of the Sunda–Java Trench is 7.5 cm per year. Eastwards from Bali, the Sunda Arc is also being thrust over the Bali and Flores back-arc basins on a series of south-dipping thrusts. Focal mechanisms for earthquakes near Bali are dominantly thrust sense on both the subduction interface and the system of thrust faults to the north.

Earthquake

The earthquake was recorded by the Wiechert seismograph at Batavia (now Jakarta), which indicated an epicenter southeast of the island. There was a general decrease in the intensity of the shaking from the south of the island to the north. The earthquake was also felt on eastern Java and Sumbawa, and particularly strongly on Lombok. A small tsunami was observed on the southeastern coast of Bali, but caused no damage.

Damage

The earthquake triggered many landslides. There were an estimated 1,500 casualties, of which 80% were a result of the landslides. 2,431 temples were destroyed or severely damaged, including the Pura Ulun Danu Batur.

Gallery

| File:COLLECTIE TROPENMUSEUM Ingestorte huizen na de aardbeving op Bali van 1917 TMnr 10004140.jpg | Collapsed houses after the earthquake in Bali | File:COLLECTIE TROPENMUSEUM Ingestorte huizen na de aardbeving op Bali in 1917 TMnr 10004141.jpg | Collapsed houses after the earthquake in Bali | File:COLLECTIE TROPENMUSEUM Ingestorte huizen na de aardbeving op Bali in 1917 TMnr 10004138.jpg | Collapsed houses after the earthquake in Bali | File:COLLECTIE TROPENMUSEUM Ingestorte bouwwerken na de aardbeving op Bali van 1917 TMnr 10004137.jpg | Collapsed houses after the earthquake in Bali | File:COLLECTIE TROPENMUSEUM Ingestort bouwwerk na de aardbeving op Bali van 1917 TMnr 10004139.jpg | Collapsed building after the earthquake in Bali

References

National Geophysical Data Center. "Significant Earthquake".
Utsu, T.. ["Catalog of Damaging Earthquakes in the World (Through 2009)"](http://iisee.kenken.go.jp/utsu/index_eng.html). International Institute of Seismology and Earthquake Engineering.
McCaffrey, R.. (1987). "Earthquakes, gravity, and the origin of the Bali Basin: an example of a nascent continental fold-and-thrust belt". Journal of Geophysical Research.
Hooykaas, C.. (1973). "Religion in Bali". BRILL.
Lansing, J.S.. (2012). "Perfect Order: Recognizing Complexity in Bali". Princeton University Press.

Info: Wikipedia Source

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