A strong earthquake hit Mexico today (March 21, 2012)

A strong 7.4 earthquake hit Mexico today from its large capital to its resort-studded southern. It seems that the way the quake shook the country and the fact that it hit in several areas where new construction were seismic proof was critical here.

In 1985 a massive 8.0 earthquake hit Mexico City and killed nearly 10,000. As a reference, the Haiti quake in 2010 was a 7.8 magnitude and the 2011 Japanese quake was 9.0 (one of the strongest ever recorded on earth).

To give you an idea one estimates that there are on average 15 earthquakes of magnitude 7.0 to 7.9 every year around the world. We are likely to see aftershocks in Mexico in the coming days (most probably in the 5.0-5.5 range).

Average number of earthquakes of a certain magnitude around the world every year:
8 and higher: 1
7 – 7.9: 15
6 – 6.9: 134
5 – 5.9: 1319
4 – 4.9: 13,000

(estimations since 1900; sources: USGS)

Impact on the G20
Mexico presides over the G20 this year and the question of disaster risk management is considered one of the key priorities on this year agenda. No question that this disaster will trigger even more interest in the question.

Update– March 25, 2012. As of today two individuals died from injuries.