Reviewed by USGSIndonesia21y ago
M4.7 earthquake 78 km WSW of Sabang, Indonesia
Monday, October 10, 2005, 02:07:45 UTC · 5.683°N, 94.639°E
A magnitude 4.7 earthquake struck 78 km WSW of Sabang, Indonesia on Monday, October 10, 2005, 02:07:45 UTC, at a depth of 30.0 km (shallow). It is the strongest earthquake within 300 km since an M4.7 on October 8, 2005.
- Magnitude
- 4.7
- Light · mb
- Depth
- 30 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: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
169 tons of TNT
That is about 1/89 of the Hiroshima bomb. A magnitude 5.0 releases about 3 times more energy.
Tectonic setting
68 km
from the nearest mapped plate boundary, between the Sunda and Burma plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
30 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 lists 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M4.7 on October 10, 2005. 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 577 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.2284 km WNW of Sabang, IndonesiaDecember 26, 2004 · 231 km NW of this epicenter
- 7.0190 km WNW of Sabang, IndonesiaMay 17, 1955 · 153 km NW of this epicenter
- 7.040 km NE of Meulaboh, IndonesiaAugust 3, 1935 · 243 km SE of this epicenter
- 6.975 km WSW of Banda Aceh, IndonesiaAugust 23, 1936 · 48 km S of this epicenter
- 6.95 km W of Banda Aceh, IndonesiaApril 2, 1964 · 73 km E of this epicenter
- 6.968 km WSW of Sabang, IndonesiaApril 4, 1983 · 10 km NE of this epicenter
- 6.8238 km WNW of Sabang, IndonesiaJanuary 20, 1917 · 196 km NW of this epicenter
- 6.7171 km W of Meulaboh, IndonesiaDecember 9, 1929 · 172 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 19 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 23 recorded deaths. The most severe:
- 1967M6.1
N Sumatera,Malay Peninsula
12 Apr 1967 · 295 km away
14 deathsSevere damage ($5–24M)tsunami
- 1936M7.3
Banda Aceh,Lhok Sukon,Lhoksemawe
23 Aug 1936 · 47 km away · intensity VIII
9 deathsModerate damage ($1–5M)tsunami
- 1964M7.0
Banda Aceh
2 Apr 1964 · 120 km away · intensity VII
Severe damage ($5–24M)tsunami
- 1837M7.3
Banda Atjeh
29 Sep 1837 · 152 km away
Moderate damage ($1–5M)tsunami
- 1983M6.6
Sumatera: Banda Aceh
4 Apr 1983 · 10 km away · intensity VII
$1 million damage
- 1982M6.3
Little Nicobar Island
20 Jan 1982 · 157 km away · intensity VIII
Moderate damage ($1–5M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.