I think this is about the smallest we have recorded to date (except for the 
1.9 @ 10Km from the vault)

See: http://bnordgren.org/seismo/gif_images.htm

On the "Instrument #1 high gain channel" image, at about 18:35 UCT  Aug 19, 
2009  is the LR surface wave from a Mag. 4.6 at 132 degrees (Indonesia).

It's not that big a trace, but the long period seismic background is fairly 
low so it is easy to see.  It must have been aimed straight at us.

Regards,
Brett

Watch our wiggles
http://bnordgren.org/seismo/gif_images.htm

or watch some very very good wiggles
http://aslwww.cr.usgs.gov/Seismic_Data/telemetry_data/ANMO_24hr.html


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