8 Magnitude and Stronger:
We had one this year. The USGS average is 1, if any per year. The RHS1 average is two per year.
7 Magnitude and Stronger:
We experienced a whopping 20 of these shakers this year. That exceeds the USGS yearly average of 17 by 3 bringing us to 117% of average.
6 Magnitude and Stronger:
We experienced 136 of these strong quakes in 2010. The USGS average is 134 per year giving us an increase of only 1% from average rates.
5 Magnitude and Stronger:
There were 1684 of these quakes during 2010! USGS average is 1319 per year leaving us a 27% increase in these quakes.
The deeper a quake is, the less it will be felt at ground level. A 7 magnitude quake happening 500 km below the surface may barely be felt, if it is at all, while a magnitude 4 happening at just a few kilometers below the surface may feel more like a 5 magnitude quake. With the crustal shifting weâve experienced this year, many quakes occurred at depths of 10 and 35 km. That means that more damage has been caused than usual and more attention has been given to earthquakes than usual. Most of the alarm is due to illusions of more prevalent shaking than actual increases of shaking other than the fact that the large, shallow quakes have caused more aftershocks due to crustal movement and they have also occurred at shallow levels where they were more noticeable than they would have been otherwise.
http://rockhoundstation1.net/wp/2011/earth-watch/2010-earthquake-watch-annual-report/
We had one this year. The USGS average is 1, if any per year. The RHS1 average is two per year.
7 Magnitude and Stronger:
We experienced a whopping 20 of these shakers this year. That exceeds the USGS yearly average of 17 by 3 bringing us to 117% of average.
6 Magnitude and Stronger:
We experienced 136 of these strong quakes in 2010. The USGS average is 134 per year giving us an increase of only 1% from average rates.
5 Magnitude and Stronger:
There were 1684 of these quakes during 2010! USGS average is 1319 per year leaving us a 27% increase in these quakes.
The deeper a quake is, the less it will be felt at ground level. A 7 magnitude quake happening 500 km below the surface may barely be felt, if it is at all, while a magnitude 4 happening at just a few kilometers below the surface may feel more like a 5 magnitude quake. With the crustal shifting weâve experienced this year, many quakes occurred at depths of 10 and 35 km. That means that more damage has been caused than usual and more attention has been given to earthquakes than usual. Most of the alarm is due to illusions of more prevalent shaking than actual increases of shaking other than the fact that the large, shallow quakes have caused more aftershocks due to crustal movement and they have also occurred at shallow levels where they were more noticeable than they would have been otherwise.
http://rockhoundstation1.net/wp/2011/earth-watch/2010-earthquake-watch-annual-report/
