Originally Posted by
ENZ
There's an interesting table in the Wikipedia
here.
The shaking an earthquake causes is more closely related to the peak ground acceleration (PGA) than to the Richter magnitude. (Duncan74 has already talked about acceleration
here.)
According to the Wikipedia table, the highest PGA ever recorded in an earthquake was the recent one in Christchurch.
PGA....... |
Richter.. |
Depth...... |
Fatalities... |
Earthquake |
2.2g |
6.3 |
5 km |
166* |
2011 Christchurch |
1.7g |
6.7 |
19 km |
57 |
1994 California |
1.26g |
7.1 |
10 km |
0 |
2010 Canterbury |
1.01g |
6.6 |
10 km |
11 |
2007 Chu-etsu |
0.8g |
6.8 |
16 km |
6,434 |
1995 Kobe |
0.78g |
8.8 |
35 km |
521 |
2010 Chile |
0.51g |
6.4 |
? |
612 |
2005 Zarand |
0.5 g |
9.0 |
32 km |
? |
2011 Sendai |
0.5g |
7.0 |
13 km |
92,000 |
2010 Haiti |
0.24g |
6.4 |
? |
628 |
2004 Morocco |
0.18g |
9.2 |
23 km |
143 |
1964 Alaska |
0.125g |
7.7 |
44 km |
27 |
1978 Miyagi |
(I see that most of the measurements are from the year 2000 onwards. I expect this is a result of more measurements being taken in recent years rather than the number of big earthquakes increasing worldwide.)
The most recent NZ Geographic shows a much higher PGA (2.7!) for the Sendai quake. All of the other metrics match their table.