Earthquakes Today: latest quakes near Marapi volcano: past 14 days

Updated Oct 17, 2021 06:25 GMT -
During the past 14 days, Marapi volcano was shaken by 1 quake of magnitude 4.0 and 1 quake of magnitude 3.1.
Biggest quake: 4.0 quake 43 km northeast of Padang, Sumatra Barat, Indonesia, Oct 15, 2021 12:55 am (GMT +7)
Most recent quake: 3.1 quake 35 km southeast of Bukittinggi, Sumatra Barat, Indonesia, Oct 15, 2021 4:32 am (GMT +7)
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Showing quakes magnitude 0.1 or higher (2 quakes):
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Thursday, October 14, 2021 21:32 GMT (2 earthquakes)
Oct 15, 2021 4:32 am (GMT +7) (Oct 14, 2021 21:32 GMT)
3.1

10 km
23 km (14 mi)35 km southeast of Bukittinggi, Sumatra Barat, Indonesia
I FELT IT
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Oct 15, 2021 12:55 am (GMT +7) (Oct 14, 2021 17:55 GMT)
4.0

10 km
24 km (15 mi)43 km northeast of Padang, Sumatra Barat, Indonesia
I FELT IT - 3 reports
MoreMap
Estimated combined seismic energy released: 6.6 x 1010 joules (18.3 megawatt hours, equivalent to 15.8 tons of TNT) More info

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Background

Gunung Marapi (not to be confused with the better-known Merapi volcano on Java) is Sumatra's most active volcano.


On 12th March 2000 an explosion from Marapi could be heard 25 km away and a black ash plume was erupted to a height of 3 km. Ash fell up to 350 km away N of Marapi. An eruption on about 23 April 2001 produced an ash cloud that rose up to 6 km and drifted to the E.
Marapi is a massive complex stratovolcano that rises 2000 m above the Bukittinggi plain in Sumatra's Padang Highlands. A broad summit contains multiple, partially overlapping craters constructed within the small 1.4-km-wide Bancah caldera. The summit craters are located along an ENE-WSW line, with volcanism migrating to the west.


More than 50 eruptions, typically consisting of small-to-moderate explosive activity, have been recorded since the end of the 18th century; no lava flows outside the summit craters have been reported in historical time.

Fatalities at Marapi:


Fatalities have been reported from eruptions in 1975, 1979 and 1992. On 30 April 1979, heavy rainfalls (300 mm of rainfall!) remobilized an old lahar and other volcanic material on Marapi's N and E flanks, producing several landslides. The largest began at 2,400 m altitude on 30 April, and traveled as much as 20 km downslope to ~70 m altitude, leaving a deposit 20-150 m wide and 1-3 m thick. 80 people were killed, five villages were damaged, and several acres of farmland were destroyed.


An explosion of Marapi Volcano on 5th July 1992 killed one person and injured five others.


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Source: GVP, Smithsonian Institute


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