New Constraints on Source Processes of Volcanic Tremor at Arenal Volcano , Costa Rica , Using Broadband Seismic Data

@inproceedings{Benoit1997NewCO,
  title={New Constraints on Source Processes of Volcanic Tremor at Arenal Volcano , Costa Rica , Using Broadband Seismic Data},
  author={John P. Benoit and Stephen R. McNutt},
  year={1997}
}
Broadband seismic data recorded 2.3 km from the active vent of Arenal Volcano, Costa Rica, provide new constraints on tremor source processes. Arenal's tremor contains as many as seven harmonics, whose frequencies vary temporally by up to 75 percent, from initial values of 1.9 Hz for the first peak immediately following explosive eruptions to 3.2-3.5 Hz several minutes later. We infer that gas bubble concentration is variable within the conduit and also changes as a function of time, thereby… CONTINUE READING