- Type:
- Earthquake
- Date:
- March 20, 1999 CE
- Location:
- 78 km WSW of Adak, Alaska
- Magnitude:
- 6.9 Mwc
- Depth:
- 33 km
- Intensity (MMI):
- 6.1
Cross-catalog records
This event is recorded in 4 separate scientific catalogs, each of which may give a different magnitude (the disagreement between catalogs is itself valuable for research):
- USGS_COMCAT: Mwc 6.9
- USGS_COMCAT: Mwc 5.4
- USGS_COMCAT: Mwc 5.5
- USGS_COMCAT: Mwc 5.2
Other earthquake records of 1999 CE
- Turkey, Istanbul, Kocaeli, Sakarya · Mw 7.6 · 17,118 deaths
- Taiwan, Nantou, Taichung, Taizhong · Mw 7.6 · 2,297 deaths
- Colombia, Armenia, Calarca, Pereira, Caldas, Huila · Mw 6.2 · 1,185 deaths
- Turkey, Bolu-Duzce-Kaynasli, Adapazari, Zonguldak · Mw 7.2 · 894 deaths
- Greece, Athens · Mw 6 · 143 deaths
- India, Chamoli, Rudraprayag, Tehri Garhwal · Mw 6.6 · 100 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 6.9 - 78 km WSW of Adak, Alaska (1999 CE) happen?
- March 20, 1999 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.
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