QuakeScout
Magnitude5.7

Reviewed by USGSIndonesia97y ago

M5.7 earthquake 91 km S of Pelabuhanratu, Indonesia

Sunday, April 27, 1930, 09:56:33 UTC · 7.807°S, 106.460°E

A magnitude 5.7 earthquake struck 91 km S of Pelabuhanratu, Indonesia on Sunday, April 27, 1930, 09:56:33 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M5.8 on March 15, 1930.

Magnitude
5.7
Moderate · mw
Depth
35 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

5 kilotons of TNT

That is about 1/3 of the Hiroshima bomb. It released about 10 times the energy of a magnitude 5.0.

Tectonic setting

156 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

35 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 75 km

USGS has not published any M2.5+ earthquake within 75 km in the 30 days after this event.

Regional history

Past M5+ earthquakes within 300 km

USGS lists 8 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 6.679 km WSW of Labuan, IndonesiaAugust 13, 1913 · 181 km NW of this epicenter
  2. 6.585 km SW of Labuan, IndonesiaMay 12, 1923 · 166 km NW of this epicenter
  3. 6.4200 km SW of Bandar Lampung, IndonesiaOctober 4, 1907 · 291 km NW of this epicenter
  4. 6.083 km SSW of Banjar, IndonesiaApril 24, 1919 · 63 km E of this epicenter
  5. 5.974 km WSW of Labuan, IndonesiaMarch 18, 1924 · 191 km NW of this epicenter
  6. 5.8248 km SSW of Pelabuhanratu, IndonesiaMarch 15, 1930 · 160 km SW of this epicenter
  7. 5.8103 km S of Banjar, IndonesiaSeptember 8, 1927 · 104 km E 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 7 recorded deaths. The most severe:

  1. 1875

    W Java: Kuningan

    25 Oct 1875 · 227 km away · intensity VIII

    7 deathsSevere damage ($5–24M)

  2. 1834

    Java: Bogor, Cinajur

    10 Oct 1834 · 137 km away · intensity IX

    Severe damage ($5–24M)

  3. 1926

    Java: Prupuk,Margarsari,Dubuktengah

    13 Dec 1926 · 291 km away · intensity IX

    Severe damage ($5–24M)

  4. 1847

    Java: Cheribon

    16 Nov 1847 · 263 km away

    Moderate damage ($1–5M)

  5. 1900

    Java: Sukabumi

    14 Jan 1900 · 121 km away · intensity VII

    Moderate damage ($1–5M)

  6. 1852M6.5

    Java: Djakarta; Sumatra: Telukbetung

    9 Jan 1852 · 180 km away · intensity VIII

    Limited damage (under $1M)tsunami

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

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