M 8.1 earthquake – 1998 Balleny Islands Earthquake
·
Local time: Mar 25, 1998 · 15:12 (UTC+12)
GreatShallow · 10 km
Reviewed by a seismologist
Loading the map…
- Magnitude
- 8.1moment magnitude (mwc)
- Depth
- 10 kmShallow earthquake
- Epicenter
- -62.877, 149.5272,181 km from Invercargill
- Energy released
- 21 megatons of TNTabout 1,420 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- —not estimated
- Aftershocks
- 24M2.5+ within 327 km, up to 60 days
- Significance
- 1,009USGS score, 0–1,000+
The strongest within 300 km on record
No earthquake this strong has been recorded this close since our catalog begins in 1900.
How strong was it?
Great earthquake. It released 21 megatons of TNT, 44,668 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
24 earthquakes of M2.5+ within 327 km in the 60 days after.
- 5.2 Balleny Islands region Mar 25, 1998
- 4.6 south of Australia Mar 25, 1998
- 4.5 Balleny Islands region Mar 25, 1998
- 4.7 south of Australia Mar 25, 1998
- 4.5 Balleny Islands region Mar 25, 1998
- 4.6 south of Australia Mar 25, 1998
- 4.8 south of Australia Mar 25, 1998
- 4.8 south of Australia Mar 25, 1998
- 4.9 Balleny Islands region Mar 25, 1998
- 6.4 south of Australia Mar 25, 1998
The strongest earthquakes within 300 km
Since 1900.
- 6.4 south of Australia Mar 25, 1998
- 6.3 Balleny Islands region Apr 15, 1939
- 6.3 Balleny Islands region Dec 17, 1991
- 6.3 Balleny Islands region May 22, 1929
- 6.3 Balleny Islands region Dec 1, 1931
- 6.2 Balleny Islands region Oct 8, 2017
- 6.2 west of Macquarie Island Oct 13, 1957
- 6.1 west of Macquarie Island Feb 27, 2018