Strong Motion Data 2011 Off the Pacific Coast of Tohoku earthquake

[ishvaaag]

http://www.k-net.bosai.go.jp/k-net/topics/TohokuTaiheiyo_20110311/nied_kyoshin1e.pdf

 

[ThomasH]

Hi

Interesting link. But I have a questing, what does the unit "gal" mean. I have never seen that before.

Regards

Thomas

 

[ishvaaag]

From what in the text said one infers are thousandt of 1g. It seems at least one of the sensors topped 3g in the records.

 

[ishvaaag]

See the chart top left of page 2.

cm/seg^2 tops 2000 as the chart in page 1.
Must be then gal=cm/seg^2

 

[ThomasH]

Hi

I found it in Wikipedia. It actually means galileo and is used in gravimetri. 1 gal = 1 cm/s^2 so 3000 gals is 30 m/s^2 or approx 3 g.

So it was a really nasty quake.

Regards

Thomas