Reviewed by USGSIndonesia21y ago
M4.4 earthquake 64 km ESE of Sinabang, Indonesia
Monday, August 15, 2005, 12:15:44 UTC · 2.282°N, 96.926°E
A magnitude 4.4 earthquake struck 64 km ESE of Sinabang, Indonesia on Monday, August 15, 2005, 12:15:44 UTC, at a depth of 30.0 km (shallow).
- Magnitude
- 4.4
- 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
60 tons of TNT
That is about 1/251 of the Hiroshima bomb. A magnitude 5.0 releases about 8 times more energy.
Tectonic setting
17 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 6 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.8 on August 19, 2005. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 4.250 km SE of Sinabang, Indonesia21y ago · 35 km SW of this epicenter
- 4.451 km SSE of Sinabang, Indonesia21y ago · 43 km SW of this epicenter
- 4.750 km SE of Sinabang, Indonesia21y ago · 29 km SW of this epicenter
- 4.3Simeulue, Indonesia21y ago · 33 km W of this epicenter
- 4.860 km SSE of Sinabang, Indonesia21y ago · 44 km SW of this epicenter
- 4.365 km SE of Sinabang, Indonesia21y ago · 38 km SW of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 447 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 9.12004 Sumatra - Andaman Islands EarthquakeDecember 26, 2004 · 154 km NW of this epicenter
- 8.678 km WSW of Singkil, IndonesiaMarch 28, 2005 · 30 km SE of this epicenter
- 8.2The 1907 Sumatra Earthquake and TsunamiJanuary 4, 1907 · 161 km W of this epicenter
- 7.5209 km WSW of Sinabang, IndonesiaNovember 21, 1969 · 266 km W of this epicenter
- 7.450 km NW of Sinabang, IndonesiaNovember 2, 2002 · 111 km NW of this epicenter
- 7.1190 km SSW of Sibolga, IndonesiaNovember 17, 1984 · 262 km SE of this epicenter
- 7.186 km WSW of Pangkalan Brandan, IndonesiaSeptember 19, 1936 · 172 km NE of this epicenter
- 7.040 km NE of Meulaboh, IndonesiaAugust 3, 1935 · 240 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 20 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 232,379 recorded deaths. The most severe:
- 2004M9.1
Sumatra: Aceh: Off West Coast
26 Dec 2004 · 154 km away
227,899 deaths$10 billion damagetsunami
- 1907M8.2
Nw Sumatra: Gunungsitoli, Barus
4 Jan 1907 · 161 km away
2,188 deathsSevere damage ($5–24M)tsunami
- 2005M8.6
Sumatera: Sw
28 Mar 2005 · 30 km away
1,319 deaths$37 million damagetsunami
- 1861M7.0
Sw. Sumatra
9 Mar 1861 · 280 km away
950 deathsSevere damage ($5–24M)tsunami
- 1936
N Sumatera: Tapanuli, Karo
9 Sep 1936 · 150 km away · intensity VIII
17 deathsModerate damage ($1–5M)
- 2002M7.3
Sumatera: Simeulue
2 Nov 2002 · 111 km away
3 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.