Reviewed by USGSIndonesia30y ago
M4.3 earthquake 112 km NW of Insrom, Indonesia
Monday, March 18, 1996, 06:21:04 UTC · 0.411°S, 135.326°E
A magnitude 4.3 earthquake struck 112 km NW of Insrom, Indonesia on Monday, March 18, 1996, 06:21:04 UTC, at a depth of 19.9 km (shallow).
- Magnitude
- 4.3
- Light · mb
- Depth
- 20 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
43 tons of TNT
That is about 1/354 of the Hiroshima bomb. A magnitude 5.0 releases about 11 times more energy.
Tectonic setting
56 km
from the nearest mapped plate boundary, between the Birds Head and Caroline plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
20 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 4 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.7 on April 2, 1996. 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 200 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.21914 Biak EarthquakeMay 26, 1914 · 251 km SE of this epicenter
- 8.11996 Biak, Indonesia EarthquakeFebruary 17, 1996 · 189 km E of this epicenter
- 7.955 km S of Biak, IndonesiaSeptember 12, 1979 · 162 km SE of this epicenter
- 7.736 km NNE of Nabire, IndonesiaJanuary 13, 1916 · 299 km S of this epicenter
- 7.65 km SW of Manokwari, IndonesiaApril 27, 1944 · 154 km W of this epicenter
- 7.6138 km SW of Insrom, IndonesiaMay 27, 1947 · 166 km S of this epicenter
- 7.3195 km E of Biak, IndonesiaApril 2, 1947 · 290 km E of this epicenter
- 7.182 km SE of Biak, IndonesiaJune 22, 1957 · 203 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 9 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 529 recorded deaths. The most severe:
- 1864M7.8
Irian Jaya: Manokwari
23 May 1864 · 75 km away · intensity VII
250 deathsSevere damage ($5–24M)tsunami
- 1996M8.2
New Guinea: Irian Jaya: Biak, Supiori
17 Feb 1996 · 189 km away · intensity IX
164 deaths$4 million damagetsunami
- 1979M7.9
New Guinea: Irian Jaya
12 Sep 1979 · 162 km away
115 deathsSevere damage ($5–24M)tsunami
- 1957M7.3
New Guinea: Irian Jaya
22 Jun 1957 · 222 km away
Severe damage ($5–24M)tsunami
- 1914M8.1
New Guinea: Irian Jaya: Japen
26 May 1914 · 239 km away · intensity IX
Moderate damage ($1–5M)tsunami
- 1985M7.1
New Guinea: Irian Jaya: Manokwari
17 Nov 1985 · 144 km away · intensity VIII
Limited damage (under $1M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.