- Type:
- Earthquake
- Date:
- May 2, 1971 CE
- Location:
- 69 km SW of Adak, Alaska
- Magnitude:
- 6.98 Mw
- Depth:
- 25 km
- Intensity (MMI):
- 6.584
Cross-catalog records
This event is recorded in 6 separate scientific catalogs, each of which may give a different magnitude (the disagreement between catalogs is itself valuable for research):
- USGS_COMCAT: Mw 6.98
- NOAA_SIGEQ: Ms 7.1
- USGS_COMCAT: Mw 6.4
- USGS_COMCAT: Mw 6.91
- USGS_COMCAT: Mw 5.86
- USGS_COMCAT: Mw 5.6
Other earthquake records of 1971 CE
- Turkey, Bingol · Ms 6.7 · 995 deaths
- Chile, Central · Mw 7.8 · 83 deaths
- California, San Fernando · Ms 6.5 · 65 deaths
- Turkey, Burdur · Ms 5.9 · 56 deaths
- Italy, Tuscania · Mb 4.6 · 24 deaths
- Peru, Apurimac · Mb 5.7 · 5 deaths
Source: U.S. Geological Survey, Advanced National Seismic System (ANSS) Comprehensive Catalog (ComCat) · License: U.S. Public Domain (USGS) · institutional record ↗
Frequently asked questions
- When did M 7.0 - 69 km SW of Adak, Alaska (1971 CE) happen?
- May 2, 1971 CE.
- Where does this information come from?
- This record comes from U.S. Geological Survey, Advanced National Seismic System (ANSS) Comprehensive Catalog (ComCat); it was not hand-authored and is stored together with its source.