The moment magnitude scale is a measure of an earthquake's magnitude based on its seismic moment. Mw was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude/Richter scale (ML) defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often use the term "Richter scale" when referring to the moment magnitude scale.
An earthquake measuring 6.5 Mw strikes a region of northwestern Iran killing at least 261 people and injuring 1,300 others and eventually causing widespread public anger due to the slow official response.
On June 22, in the year 2002, An earthquake measuring 6.5 Mw strikes a region of northwestern Iran killing at least 261 people and injuring 1,300 others and eventually causing widespread public anger due to the slow official response. This event is recorded as a Historical Events event in the history of June 22, a notable event in this corner of history.
Key Facts
- This event took place on June 22, 2002 (AD era).
- It is categorised as a Historical Events event in recorded history.
- Referenced in 3 Wikipedia articles.
- Wikipedia source last updated on 13 June 2026.
On This Date in History
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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