Hi Geoff -

Yes, I recorded it too.  The waveform and duration is typical of many =
aftershocks that I have recently recorded.  The USGS normally uses a =
cutoff of M 4.5 for events outside of the US, and M 2.5 for events =
inside the US,  However, with the recent M 7.2 event in Baja California, =
the USGS appears to have deviated from that policy and have listed many =
events with a lower magnitude.  Also within the past year, there have =
been a number of events further south and east along the San Andreas =
fault as it splits Baja California.  If the event is not listed, it is =
possible that the USGS evaluated the event and found it did not meet =
their minimum magnitude for events outside of the US.

Bob Hancock


On May 3, 2010, at 1:08 AM, Geoffrey wrote:

> Hello PSN:
>=20
> I have received a signal which appears in TUC also
> Yet I see no reports anywhere.
>=20
> POSSIBLE_ORIGIN TIME:
> 04:55:35_2010MAY03_UTC
> It should be quite close to this time.
> Ml 4.0 RICHTER maybe 5.69 Degrees distance from
> Apache Junction AZ.
>=20
> Does Anyone know where this was.
>=20
> Regards;
> geoff
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