M 6.7 earthquake – Tonga
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Local time: Jun 3, 1985 · 01:06 (UTC-11)
StrongShallow · 33 km
Reviewed by a seismologist
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- Magnitude
- 6.7moment magnitude (mw)
- Depth
- 33 kmShallow earthquake
- Epicenter
- -15.289, -173.516249 km from Apia
- Energy released
- 169 kilotons of TNTabout 11 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- —not estimated
- Aftershocks
- 2M2.5+ within 49 km, up to 60 days
- Significance
- 691USGS score, 0–1,000+
Not rare around here
An earthquake at least as strong struck within 300 km on Oct 15, 1984.
How strong was it?
Strong earthquake. It released 169 kilotons of TNT, 355 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
2 earthquakes of M2.5+ within 49 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900, around Samoa.
- 8.1 2009 Samoa Earthquake Sep 29, 2009
- 8.0 The 1917 Samoa-Tonga Earthquake Jun 26, 1917
- 7.8 146 km ESE of Hihifo, Tonga Dec 26, 1975
- 7.7 133 km NE of Hihifo, Tonga Sep 1, 1981
- 7.6 82 km WNW of Hihifo, Tonga May 10, 2023
- 7.6 199 km ESE of Hihifo, Tonga Apr 2, 1977
- 7.4 88 km NNE of Hihifo, Tonga Apr 7, 1995
- 7.2 117 km SSW of Hihifo, Tonga Jan 8, 2000