| This photo was taken from the helicopter as we flew into Okmok caldera. "Cone D" is visible in the center. This cone has a basal platform believed to indicate the height of a former lake inside the caldera. One of our seismic stations was positioned on this platform. |
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This is the portable seismometer deployed in the Okmok caldera. The instrument, designed and built by Guy Tytgat of AVO, is composed of an L4-C geophone (buried just out of sight on the left side of the photo), a digitizer connected to a laptop parallel port and a GPS receiver that sets the computer time via a serial connection. Shortly after the photo was taken, the laptop was closed in a Pelican case for protection from the elements. |
We deployed a smoke paper drum recorder near Cape Idak on Okmok's eastern flank. Here, Steve McNutt closes the box after deploying the instrument. |
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Just before closing the drum, Steve marks the time on the drum record. |
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Spectacular fog near cone D. We walked across the caldera, recording 10 minutes of seismic data every 200 m or so and were greeted by gorgeous fog drifts. |
The helicopter in the fog. Bill Springer, helicopter pilot extraordinaire, drops us off in the caldera for our caldera profile. |
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Another shot of the helicopter in the fog. Here, Bill heads home after leaving us at a temporary station on Okmok's northwest flank. |
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Can't quite get enough of this fog (at least when it wasn't so severe we couldn't fly). This mountain rising above the fog bank is Mt. Tulik, a satellite cone next to the caldera. |
Lupine covers the flanks of Okmok. The dew near the Idak station made it a particularly beautiful sight. |
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Another view of the caldera, this one looking back at cone D as we did the caldera profile. In the foreground, somewhere in the dark is station "J", our tenth profile site. |
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