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.
A 7
A 7.8-magnitude earthquake strikes Sistan and Balochistan province, Iran, killing at least 35 people and injuring 117 others.
On April 16, in the year 2013, A 7.8-magnitude earthquake strikes Sistan and Balochistan province, Iran, killing at least 35 people and injuring 117 others. This event is recorded as a Historical Events event in the history of April 16, one of 433 recorded events on this date across all of history.
Key Facts
- This event took place on April 16, 2013 (AD era).
- It is categorised as a Historical Events event in recorded history.
- Referenced in 3 Wikipedia articles.
- Wikipedia source last updated on 21 February 2026.
On This Date in History 433
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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