Reviewed by USGSIndonesia20y ago
M4.9 earthquake 203 km SSW of Singaparna, Indonesia
Saturday, August 12, 2006, 21:29:25 UTC · 9.120°S, 107.607°E
A magnitude 4.9 earthquake struck 203 km SSW of Singaparna, Indonesia on Saturday, August 12, 2006, 21:29:25 UTC, at a depth of 10.0 km (shallow). It is the strongest earthquake within 300 km since an M5.0 on August 12, 2006.
- Magnitude
- 4.9
- Light · mb
- Depth
- 10 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
338 tons of TNT
That is about 1/45 of the Hiroshima bomb. A magnitude 5.0 releases about 1 times more energy.
Tectonic setting
88 km
from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
10 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 7 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M5.1 on September 4, 2006. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 5.1220 km SSW of Singaparna, Indonesia20y ago · 17 km SW of this epicenter
- 4.7225 km SSW of Kawalu, Indonesia20y ago · 22 km S of this epicenter
- 5.0245 km SSW of Kawalu, Indonesia20y ago · 50 km S of this epicenter
- 5.0237 km SSW of Kawalu, Indonesia20y ago · 44 km SE of this epicenter
- 4.9199 km S of Kawalu, Indonesia20y ago · 37 km E of this epicenter
- 4.6213 km S of Kawalu, Indonesia20y ago · 37 km SE of this epicenter
- 4.4217 km S of Kawalu, Indonesia20y ago · 38 km SE of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 301 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.7226 km SSW of Singaparna, IndonesiaJuly 17, 2006 · 28 km SW of this epicenter
- 7.487 km SSW of Srandakan, IndonesiaJuly 23, 1943 · 252 km E of this epicenter
- 6.9south of Java, IndonesiaJuly 24, 1979 · 226 km S of this epicenter
- 6.5260 km SSW of Kroya, IndonesiaSeptember 7, 1974 · 113 km SE of this epicenter
- 6.519 km W of Ciranjang-hilir, IndonesiaOctober 9, 1985 · 265 km N of this epicenter
- 6.3136 km S of Kawalu, IndonesiaSeptember 14, 1944 · 75 km NE of this epicenter
- 6.3157 km WSW of Pelabuhanratu, IndonesiaJanuary 18, 1931 · 292 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 23 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 1,056 recorded deaths. The most severe:
- 2006M7.7
Java
17 Jul 2006 · 28 km away
802 deaths$55 million damagetsunami
- 1943M8.1
Java: Jogyakarta
23 Jul 1943 · 266 km away · intensity VIII
213 deathsSevere damage ($5–24M)
- 1979M6.1
Java
2 Nov 1979 · 178 km away
30 deaths$16 million damage
- 1875
W Java: Kuningan
25 Oct 1875 · 258 km away · intensity VIII
7 deathsSevere damage ($5–24M)
- 1937M7.2
Java: Jogyakarta: Klumpit,Prambanan
27 Sep 1937 · 286 km away · intensity IX
1 deathSevere damage ($5–24M)
- 1971M5.2
Java: Buaran,Bantar Kawsun,Jipang
16 Jun 1971 · 269 km away
1 deathSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.