Reviewed by USGSPapua New Guinea30y ago
M4.3 earthquake in Bougainville region, Papua New Guinea
Monday, June 3, 1996, 17:37:38 UTC · 6.672°S, 155.281°E
A magnitude 4.3 earthquake struck in Bougainville region, Papua New Guinea on Monday, June 3, 1996, 17:37:38 UTC, at a depth of 71.2 km (intermediate).
- Magnitude
- 4.3
- Light · mb
- Depth
- 71 km
- Intermediate
- 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
64 km
from the nearest mapped plate boundary, between the Pacific and North Bismarck plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: intermediate
71 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 M3.8 on June 13, 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 992 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.21919 Papua New Guinea EarthquakeMay 6, 1919 · 260 km NW of this epicenter
- 8.01971 New Britain EarthquakeJuly 14, 1971 · 206 km NW of this epicenter
- 7.956 km WSW of Panguna, Papua New GuineaJuly 20, 1975 · 27 km W of this epicenter
- 7.885 km S of Panguna, Papua New GuineaJanuary 30, 1939 · 48 km S of this epicenter
- 7.794 km SSW of Panguna, Papua New GuineaJuly 20, 1975 · 50 km S of this epicenter
- 7.7155 km WNW of Panguna, Papua New GuineaAugust 16, 1995 · 156 km NW of this epicenter
- 7.7152 km SE of Kokopo, Papua New GuineaSeptember 29, 1946 · 270 km NW of this epicenter
- 7.6157 km ESE of Kokopo, Papua New GuineaMarch 18, 1983 · 274 km NW 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 9 recorded deaths. The most severe:
- 1939M7.7
Bougainville Island
30 Jan 1939 · 47 km away
5 deathsModerate damage ($1–5M)tsunami
- 1971M7.9
New Ireland: Bougainville
14 Jul 1971 · 201 km away · intensity IX
3 deathsUnder $1 million damagetsunami
- 1996M7.2
Bougainville Island
29 Apr 1996 · 36 km away
1 deathModerate damage ($1–5M)
- 1975M7.9
Bismarck Sea: Bougainville
20 Jul 1975 · 27 km away · intensity VIII
Severe damage ($5–24M)tsunami
- 1959M7.3
Solomon Islands
17 Aug 1959 · 122 km away
Severe damage ($5–24M)tsunami
- 1983M7.6
New Ireland
18 Mar 1983 · 274 km away · intensity VII
Moderate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.