Obviously, I'm not a geological expert on such things and perhaps this number of earthquakes around the globe is normal. However, I do know that the Richter scale used to max out at 9.0. It has since been revised to 9.5 as the maximum.
Also, the fact that scientists are now saying this quake caused the Earth to speed up and wobble more on it's axis, indicates the effects a quake of this size can have.
Below the fold are the additional quakes and tremors I've managed to discover through my searching.
Dec. 29 4:50 GMT Richter scale: 3.6
2. Eight quakes rock tsunami-hit Andaman and Nicobar Islands
19:20 GMT Richter scale: 5.1
15:40 GMT Richter scale: 5.0
07:10 GMT Richter scale: 5.7
07:21 GMT Richter scale: 6.1
11:27 GMT Richter scale: 5.8
07:44 GMT Richter scale: 5.4
12:00 GMT Richter scale: 5.1
12:02 GMT Richter scale: 5.2
4. 4.6 magnitude tremor rocks Ilocos province
Dec. 28 Richter scale: 4.6
Dec. 27 Two tremors, each around 3.0 on the Richter scale.
5. Moderate tremor jolts central Japan
Dec. 28 09:30 GMT Richter scale: 4.9
Article says this tremor has nothing to do with the tsunami related quake. OK. I'm still putting it on my list!
6. VOLCANO BECOMES ACTIVE IN KAMCHATKA
Dec. 28 "As RIA Novosti was told on Tuesday at the Kamchatka experimental-methodological seismologic expedition, a column of gas and ashes rose to such a height at 12.39 Moscow time. The height of the ejection above sea level exceeded 5,000 m."
This was the spot of a 9.0 Richter earthquake in 1952. See here for more with a map.
7. Earthquake kills one in southwest China province
Dec. 26 Richter scale: 5.0
8. Massive quake hits off Tasmania
Dec. 23 01:59 GMT Richter scale: 8.1
These are the ones I found, there could be more. If you know of others, let me know and I'll include them in the list.
A poster below pointed me in the direction of this site, very cool map showing geographically exactly what I'm talking about but with far more than 8 instances! Check it out: Recent World Earthquake Activity