M 6.9 earthquake – Northwest Territories, Canada
·
Local time: Dec 22, 1985 · 22:16 (UTC-7)
StrongShallow · 6.0 km
Reviewed by a seismologist
Loading the map…
- Magnitude
- 6.9moment magnitude (mw)
- Depth
- 6.0 kmShallow earthquake
- Epicenter
- 62.222, -124.239510 km from Yellowknife
- Energy released
- 338 kilotons of TNTabout 23 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 8.7max. instrumental (MMI)
- Aftershocks
- 12M2.5+ within 64 km, up to 60 days
- Significance
- 732USGS 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?
Strong earthquake. It released 338 kilotons of TNT, 708 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
12 earthquakes of M2.5+ within 64 km in the 60 days after.
- 5.4 Northwest Territories, Canada Dec 23, 1985
- 4.8 Northwest Territories, Canada Dec 23, 1985
- 5.2 Northwest Territories, Canada Dec 23, 1985
- 4.7 Northwest Territories, Canada Dec 24, 1985
- 5.7 Northwest Territories, Canada Dec 25, 1985
- 5.4 Northwest Territories, Canada Dec 25, 1985
- 4.7 Northwest Territories, Canada Dec 26, 1985
- 4.8 Northwest Territories, Canada Dec 30, 1985
- 5.0 Northwest Territories, Canada Jan 1, 1986
- 4.6 Northwest Territories, Canada Jan 30, 1986
The strongest earthquakes within 300 km
Since 1900, around Canada.
- 6.7 Northwest Territories, Canada Oct 5, 1985
- 6.2 Northwest Territories, Canada Mar 25, 1988
- 5.7 Northwest Territories, Canada Dec 25, 1985
- 5.4 Northwest Territories, Canada Mar 25, 1988
- 5.4 Northwest Territories, Canada Dec 25, 1985
- 5.4 Northwest Territories, Canada Dec 23, 1985
- 5.3 207 km S of Norman Wells, Canada Sep 26, 2011
- 5.3 Northwest Territories, Canada Feb 13, 1986