I'd say 3-4.5M
Posted by Steve on April 02, 2007 at 20:44:43:

Geomag disruption @ Tuscon @ 2230 UTC (Appx.). I'm expecting 3.0-4.5 Salton Trough to Baja. Mexico likely, So. Cal, not so likely.
Experimental. Let's see.
Also saw spikes at 1300 and 1900 UTC (appx.). Still waiting for those to come in. 3.0-4.5 likely for the Southern half of CA, and N. Mexico.
Let's see if this pans out.
Cheers!
Steve

Follow Ups:
     ● Thinking Borrego Springs Area - Luke  04:28:55 - 4/3/2007  (65072)  (1)
        ● Wake up call - Steve  02:51:01 - 4/5/2007  (65239)  (0)