Reviewed by USGSIndonesia50y ago
M4.8 earthquake 103 km SSE of Bima, Indonesia
Thursday, January 27, 1977, 09:13:38 UTC · 9.364°S, 118.960°E
A magnitude 4.8 earthquake struck 103 km SSE of Bima, Indonesia on Thursday, January 27, 1977, 09:13:38 UTC, at a depth of 33.0 km (shallow). It is the strongest earthquake within 300 km since an M6.3 on January 2, 1977.
- Magnitude
- 4.8
- Light · 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 earthquake
In context
How big was it, and why here?
Energy released
239 tons of TNT
That is about 1/63 of the Hiroshima bomb. A magnitude 5.0 releases about 2 times more energy.
Tectonic setting
185 km
from the nearest mapped plate boundary, between the Sunda and Timor 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 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 77 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.0133 km NNE of Pototano, IndonesiaJuly 5, 1911 · 256 km NW of this epicenter
- 7.084 km SSE of Dompu, IndonesiaMay 9, 1922 · 32 km W of this epicenter
- 6.835 km SW of Ruteng, IndonesiaJanuary 26, 1968 · 153 km E of this epicenter
- 6.746 km NE of Bima, IndonesiaNovember 2, 1954 · 137 km N of this epicenter
- 6.724 km ESE of Ruteng, IndonesiaNovember 28, 1928 · 201 km E of this epicenter
- 6.4112 km N of Labuan Bajo, IndonesiaJanuary 23, 1976 · 234 km NE of this epicenter
- 6.4248 km S of Taliwang, IndonesiaMay 28, 1972 · 285 km SW of this epicenter
- 6.386 km N of Ruteng, IndonesiaApril 23, 1949 · 245 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 7 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 689 recorded deaths. The most severe:
- 1820M7.5
Sulawesi: Makasar
29 Dec 1820 · 263 km away · intensity X
500 deathsModerate damage ($1–5M)tsunami
- 1977M8.3
Sunda Islands
19 Aug 1977 · 210 km away
189 deaths$1 million damagetsunami
- 1828
Sulawesi
29 Dec 1828 · 263 km away · intensity IX
Severe damage ($5–24M)tsunami
- 1836M7.5
Flores Sea
28 Nov 1836 · 122 km away
Limited damage (under $1M)tsunami
- 1954M6.8
Sumabawa: Bima,Raba
2 Nov 1954 · 152 km away · intensity VIII
Limited damage (under $1M)
- 1837
Sumbawa Island: Bima
28 Nov 1837 · 109 km away · intensity IX
Limited damage (under $1M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.