I've had a SEP seismometer running for a month or so and everything
has been fine.  However, a couple of days ago while we were away on
vacation it began reporting no activity.  When I got back home I found
that the mass had moved all the way to the side, so I had to change
the tilt a little so it would move back to the centre again.

Is this normal behaviour for a Lehmann seismometer?  The mass moved
away from the center at a time the house was empty, so I can't really
think of any external disturbances which could have caused this.

-- 
Steinar Midtskogen
http://voksenlia.net/met/seismometer/
__________________________________________________________

Public Seismic Network Mailing List (PSN-L)