jan2020  earthquakes

30jan20

Related Links:
  list of quake, strength, cable/tilt sensor oscillation freq

The earthquakes.

    Puerto rico experienced a number of strong earthquakes starting on 6jan20 through 11jan20 (see a list of quake, strength, cable/tilt sensor oscillation freq). After the first quake on 6jan20 the telescope was parked with the motors off and the brakes on (except for one or 2 instances).  The az encoder (read once a second) showed that the azimuth arm moved during each of the stronger quakes. This is to be expected since:

Some occurrences that may have moved the telescope (times are ast epicenter times):

date
time
ast
strength
notes
06jan20
06:32:18 5.8
telescope was moving during quake
07jan20



04:24:26
6.4
operator moved dome .03 degrees
04:34:02
5.6

04;50:46
5.0

07:11:18
5.6

10jan20
18:26:25
5.2

11jan20
08:54:45
5.9

22jan20
17:55:58
-
observer moved telescope
az .3 deg
dome: .03 deg
After about 20 minutes they returned az,gr to original position.


Plots were made showing the motion of the telescope 6 jan to 28 jan20. (.pdf)

SUMMARY


processing: x101/200130/telposquake.pro


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