Reviewed by USGSIndonesia49y ago
M5.3 earthquake 190 km S of Dompu, Indonesia
Tuesday, October 18, 1977, 07:11:56 UTC · 10.232°S, 118.183°E
A magnitude 5.3 earthquake struck 190 km S of Dompu, Indonesia on Tuesday, October 18, 1977, 07:11:56 UTC, at a depth of 33.0 km (shallow). It is the strongest earthquake within 300 km since an M5.5 on October 16, 1977.
- Magnitude
- 5.3
- Moderate · mb
- Depth
- 33 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 earthquakeDashed circle: 75 km aftershock search area
In context
How big was it, and why here?
Energy released
1 kilotons of TNT
That is about 1/11 of the Hiroshima bomb. It released about 3 times the energy of a magnitude 5.0.
Tectonic setting
127 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
33 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 lists 4 M2.5+ earthquakes within 75 km in the following 30 days; the largest was M5.7 on October 30, 1977. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 205 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.31977 Sumba, Indonesia EarthquakeAugust 19, 1977 · 105 km S of this epicenter
- 7.084 km SSE of Dompu, IndonesiaMay 9, 1922 · 120 km NE of this epicenter
- 6.835 km SW of Ruteng, IndonesiaJanuary 26, 1968 · 274 km NE of this epicenter
- 6.746 km NE of Bima, IndonesiaNovember 2, 1954 · 250 km N of this epicenter
- 6.4248 km S of Taliwang, IndonesiaMay 28, 1972 · 159 km SW of this epicenter
- 6.377 km WSW of Waingapu, IndonesiaOctober 15, 1923 · 161 km E of this epicenter
- 6.362 km S of Waingapu, IndonesiaOctober 15, 1923 · 227 km E of this epicenter
- 6.3161 km S of Sumbawa Besar, IndonesiaOctober 7, 1977 · 100 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 5 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 189 recorded deaths. The most severe:
- 1977M8.3
Sunda Islands
19 Aug 1977 · 106 km away
189 deaths$1 million damagetsunami
- 1836M7.5
Flores Sea
28 Nov 1836 · 222 km away
Limited damage (under $1M)tsunami
- 1954M6.8
Sumabawa: Bima,Raba
2 Nov 1954 · 264 km away · intensity VIII
Limited damage (under $1M)
- 1837
Sumbawa Island: Bima
28 Nov 1837 · 196 km away · intensity IX
Limited damage (under $1M)
- 1836
Flores Sea
5 Mar 1836 · 222 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.