Reviewed by USGSIndonesia68y ago
M6.0 earthquake 103 km S of Sumberpucung, Indonesia
Monday, October 20, 1958, 01:12:39 UTC · 9.086°S, 112.393°E
A magnitude 6.0 earthquake struck 103 km S of Sumberpucung, Indonesia on Monday, October 20, 1958, 01:12:39 UTC, at a depth of 55.0 km (shallow). It is the strongest earthquake within 300 km since an M6.0 on October 12, 1957.
- Magnitude
- 6.0
- Moderate · mw
- Depth
- 55 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- IV
- Light (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
14 kilotons of TNT
That is about the energy of the Hiroshima bomb. It released about 30 times the energy of a magnitude 5.0.
Tectonic setting
175 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
55 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 16 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.6233 km S of Pundong, IndonesiaSeptember 11, 1921 · 219 km SW of this epicenter
- 7.487 km SSW of Srandakan, IndonesiaJuly 23, 1943 · 285 km W of this epicenter
- 7.1138 km SSE of Pundong, IndonesiaSeptember 10, 1926 · 194 km W of this epicenter
- 6.992 km S of Pundong, IndonesiaSeptember 27, 1937 · 219 km W of this epicenter
- 6.7169 km S of Boyolangu, IndonesiaJuly 7, 1910 · 101 km SW of this epicenter
- 6.668 km S of Sumberpucung, IndonesiaSeptember 11, 1916 · 35 km N of this epicenter
- 6.69 km NW of Tuban, IndonesiaJune 19, 1950 · 255 km N of this epicenter
- 6.4244 km SSW of Trenggalek, IndonesiaMay 29, 1955 · 198 km SW 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 11,682 recorded deaths. The most severe:
- 1815M7.3
Bali
22 Nov 1815 · 297 km away · intensity IX
11,453 deathstsunami
- 1943M8.1
Java: Jogyakarta
23 Jul 1943 · 267 km away · intensity VIII
213 deathsSevere damage ($5–24M)
- 1958M6.7
Java: Malang
20 Oct 1958 · 48 km away · intensity VIII
8 deathsModerate damage ($1–5M)
- 1867
Java: Jogyakarta, Surakarta
10 Jun 1867 · 262 km away · intensity IX
5 deathsSevere damage ($5–24M)tsunami
- 1859
S. Java Sea
20 Oct 1859 · 153 km away
2 deathsLimited damage (under $1M)tsunami
- 1937M7.2
Java: Jogyakarta: Klumpit,Prambanan
27 Sep 1937 · 243 km away · intensity IX
1 deathSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.