Thursday August 6th– Today things ran slightly differently and the groups were split up to do different activities with new people. We were chosen to work on a seismic activity monitoring lab along the highway. At the start of the morning we searched for good spots along the shoulders of the highway where the ground wasn’t too loose or rocky so that the equipment could be properly coupled with the ground, this prevents the magnet spring mechanism from rattling around in the ground and corrupting the data. We planted three seismographs at different locations and recorded their coordinates, elevation, serial number, and named them. Three hours later we returned to the sites to unearth them and bring them back to the Coldwater Center. After attaching the many chords and organizing the power box, which was very difficult, Kat a seismograph expert helped us pull the data off the seismographs. We split into two groups then, one analyzed data from the seismographs from along the Pumice Plain trail and the other looked at the data we had gathered that day from the cars going along the highway. We were able to identify the range of cars that had gone by based on the disturbances they made. By dividing the distance between seismographs JVL and LOL and then multiplying by 3600 to get into hours and changing it into miles from kilometers we were able to see the speed of the cars going by. The third seismograph, FOB, had been unsuccessfully coupled with the loose dirt and its data was obscured. The second group looked through the data from the pumice plain trying to find an earthquake within the readings that had happened since it was activated.

Seismogram of cars passing our seismometers
Spectrograms of rockfall we recorded