Reviewed by USGSIndonesia30y ago
M4.4 earthquake 43 km SE of Biak, Indonesia
Tuesday, May 7, 1996, 15:36:37 UTC · 1.483°S, 136.322°E
A magnitude 4.4 earthquake struck 43 km SE of Biak, Indonesia on Tuesday, May 7, 1996, 15:36:37 UTC, at a depth of 33.0 km (shallow).
- Magnitude
- 4.4
- 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 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
130 km
from the nearest mapped plate boundary, between the Maoke and Birds Head 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 lists 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M4.4 on June 4, 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 362 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 · 89 km SE of this epicenter
- 8.11996 Biak, Indonesia EarthquakeFebruary 17, 1996 · 96 km NE of this epicenter
- 7.955 km S of Biak, IndonesiaSeptember 12, 1979 · 38 km SW of this epicenter
- 7.8230 km W of Abepura, IndonesiaJune 1, 1906 · 273 km SE of this epicenter
- 7.736 km NNE of Nabire, IndonesiaJanuary 13, 1916 · 191 km S of this epicenter
- 7.65 km SW of Manokwari, IndonesiaApril 27, 1944 · 263 km W of this epicenter
- 7.6138 km SW of Insrom, IndonesiaMay 27, 1947 · 151 km W of this epicenter
- 7.3195 km E of Biak, IndonesiaApril 2, 1947 · 174 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 539 recorded deaths. The most severe:
- 1864M7.8
Irian Jaya: Manokwari
23 May 1864 · 156 km away · intensity VII
250 deathsSevere damage ($5–24M)tsunami
- 1996M8.2
New Guinea: Irian Jaya: Biak, Supiori
17 Feb 1996 · 96 km away · intensity IX
164 deaths$4 million damagetsunami
- 1979M7.9
New Guinea: Irian Jaya
12 Sep 1979 · 38 km away
115 deathsSevere damage ($5–24M)tsunami
- 1985M6.3
New Guinea: Irian Jaya: Enarotali
15 Sep 1985 · 296 km away
10 deathsModerate damage ($1–5M)
- 1957M7.3
New Guinea: Irian Jaya
22 Jun 1957 · 75 km away
Severe damage ($5–24M)tsunami
- 1914M8.1
New Guinea: Irian Jaya: Japen
26 May 1914 · 79 km away · intensity IX
Moderate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.