M 6.3 earthquake – Balleny Islands region
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Local time: Dec 17, 1991 · 16:41 (UTC+13)
StrongShallow · 10 km
Reviewed by a seismologist
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- Magnitude
- 6.3moment magnitude (mw)
- Depth
- 10 kmShallow earthquake
- Epicenter
- -62.551, 155.0541,984 km from Invercargill
- Energy released
- 43 kilotons of TNTabout 2.8 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- —not estimated
- Aftershocks
- 0M2.5+ within 30 km
- Significance
- 611USGS score, 0–1,000+
The strongest here since 1952
The last earthquake at least as strong within 300 km struck on May 31, 1952.
How strong was it?
Strong earthquake. It released 43 kilotons of TNT, 89 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
The strongest earthquakes within 300 km
Since 1900.
- 8.1 1998 Balleny Islands Earthquake Mar 25, 1998
- 6.8 Balleny Islands region Mar 23, 1945
- 6.7 Balleny Islands region Jun 21, 1995
- 6.6 west of Macquarie Island Dec 12, 2021
- 6.6 west of Macquarie Island Oct 9, 2012
- 6.5 west of Macquarie Island Aug 9, 2008
- 6.4 Balleny Islands region Feb 3, 1995
- 6.4 west of Macquarie Island Jun 29, 1993