SUNY Potsdam Seismic Network



NOTICE: PLEASE fill out this earthquake intensity survey -- this will help us with our research. We will post the results of this survey here. Thank you!
Note: this survey is hosted on a different server due to it requiring PHP. If you would like a printed survey instead, or one mailed to you, please email Eric Thern.



QUICK NOTES ABOUT THESE TRACES:

Since there was a lot of background noise on some of these, we didn't get really good graphs on FINE, LOZ, or MSNY. BGR even had quite a bit of noise.
If you look closely, you can see the start of this event even in these graphs, but it is hard to rely on this data.
The good data can be seen in BRCN, CHIP, PTN as well as barely in BGR.
Data sets marked with a start period start at this time - other data sets are closeups of events, but the start times can be determined by reading these main ones that include times, and then tracing the seconds over till you see the start of the event and adding that to the beginning time.


April 20th 2002 6:51am -- Earthquake had a magnitude of 5.1 -- epicenter was about 17 miles southwest of Plattsburgh, New York.

Main Earthquake Data: Saturday April 20th, 2002 - about 6:51am EST

Here are the main traces:
BGR | BRCN | CHIP | FINE | LOZ | MSNY | PTN

All of the multiple data sets start at approximately 10:51:00 UTC (6:51am EST)
All sites on one graph | The "good" data sets on one graph


April 20th 2002 7:05am -- Aftershock had a magnitude of about 4.0 -- epicenter was about 18 miles southwest of Plattsburgh, New York.

Aftershock Data: Saturday April 20th, 2002 - about 7:05am EST

Here are the main traces: (FINE, LOZ, MSNY left off due to poor reception)
BGR no filter | BRCN filter | BRCN no filter | CHIP filter | CHIP no filter | PTN filter | PTN no filter

All of the multiple data sets start at approximately 11:04:45 UTC (7:04:45am EST)
All sites with filter | All sites without filter | "good" sites with filter | "good" sites without filter


As time permits, there will be another update to this section to explain things more.

Questions about these graphs can be sent to Eric Thern thern18@potsdam.edu


Here are the full-day traces of the events. Keep in mind that EST is not in daylight savings time!

BGR | BRCN | CHIP | FINE | LOZ | MSNY | PTN



Map Links to each of the stations

BGR = Bangor, New York
BRCN = Brasie Corners, New York
CHIP = Chipman, New York
FINE = Fine, New York
LOZ = Lake Ozonia, New York
MSNY = Massena, New York
PTN = Potsdam, New York


PICTURES of the damage on Route 9n near Keeseville, NY

whole view of the damage
road closeup
yet another closeup
a view of the 'strata'
view from below - the hillside has bulged out here
picture of the mudflow that came out of the bottom of the hillside, this caused the road collapse.
closer up picture of the mud/sand - this was similar to quicksand, completely saturated but looking 'dry' on the top

Pictures taken by Eric Thern.


For more information about this earthquake, visit the USGS Bulletin:
USGS Bulletin about this earthquake





The SUNY Potsdam Seismic Network is run by Dr. Frank Revetta.
Earthworm setup and maintainance is a joint effort between Andrew McDermott and Eric Thern and the SUNY Potsdam Geology department.

[USGS] U.S. Geological Survey
[CNSS] Council of the National Seismic System
Earthworm Software
Earthworm Documentation

SUNY Potsdam Geology Department