QuakeScout
Magnitude4.6

Reviewed by USGSIndonesia25y ago

M4.6 earthquake 107 km SW of Pagar Alam, Indonesia

Friday, August 31, 2001, 01:07:10 UTC · 4.743°S, 102.590°E

A magnitude 4.6 earthquake struck 107 km SW of Pagar Alam, Indonesia on Friday, August 31, 2001, 01:07:10 UTC, at a depth of 50.1 km (shallow). It is the strongest earthquake within 300 km since an M4.7 on August 31, 2001.

Magnitude
4.6
Light · mb
Depth
50 km
Shallow
Felt reports
0
Did You Feel It?
Est. shaking
—
No ShakeMap
PAGER alert
None
Not issued
Tsunami
No flag
USGS feed

Outlined circle: this earthquake

In context

How big was it, and why here?

Energy released

120 tons of TNT

That is about 1/126 of the Hiroshima bomb. A magnitude 5.0 releases about 4 times more energy.

Tectonic setting

193 km

from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.

Depth: shallow

50 km

Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.

Did You Feel It?

Where it was felt

No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.

I felt it — report to USGS ↗

USGS PAGER estimate

Who was exposed to shaking

USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.

After the main event

Aftershocks within 50 km

USGS has not published any M2.5+ earthquake within 50 km in the 30 days after this event.

Regional history

Past M5+ earthquakes within 300 km

USGS lists 610 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.9103 km S of Bengkulu, IndonesiaJune 4, 2000 · 56 km W of this epicenter
  2. 7.676 km SSW of Sungai Penuh, IndonesiaJune 3, 1909 · 274 km NW of this epicenter
  3. 7.573 km WSW of Bengkulu, IndonesiaJune 25, 1914 · 133 km NW of this epicenter
  4. 7.548 km SW of Kotabumi, IndonesiaJune 24, 1933 · 231 km E of this epicenter
  5. 7.4102 km SSE of Bengkulu, IndonesiaFebruary 13, 2001 · 8 km NW of this epicenter
  6. 7.478 km NNW of Curup, IndonesiaJune 8, 1943 · 216 km N of this epicenter
  7. 7.3161 km S of Bengkulu, IndonesiaSeptember 25, 1931 · 68 km SW of this epicenter
  8. 7.0164 km SSW of Pagar Alam, IndonesiaFebruary 10, 1931 · 68 km S of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 13 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 339 recorded deaths. The most severe:

  1. 1994M6.9

    Southern Sumatera, Liwa, Lampung

    15 Feb 1994 · 191 km away

    207 deaths$170 million damage

  2. 2000M7.9

    Sumatra: Bengkulu, Enggano

    4 Jun 2000 · 56 km away · intensity VI

    103 deaths$6 million damage

  3. 1914M7.6

    Sumatera

    25 Jun 1914 · 125 km away

    20 deathsLimited damage (under $1M)tsunami

  4. 1979M6.6

    S Sumatera

    15 Dec 1979 · 161 km away

    8 deathsSevere damage ($5–24M)

  5. 2000M6.7

    Southern Sumatera: Lahat

    7 Jun 2000 · 77 km away

    1 deathModerate damage ($1–5M)

  6. 1770M7.0

    Sumatra:

    1770 · 71 km away

    Severe damage ($5–24M)tsunami

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

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