This permits accurate determination of the time of onset of an eruption, even in the dark or during poor weather, which is critical information for agencies concerned with the safe operation of aircraft above and many hundreds of kilometers downwind from the volcanoes. Many seismometers are located on each of these volcanoes and the data is telemetered to Anchorage and Fairbanks in real time for processing and analysis. Helicopter and pilot arrive about 5pm. DT2 disassembled but not removed because weather forced helicopter away from site. Air freight, including electronic test equipment and tools, still has not arrived.
Weather begins to deteriorate.
Thursday June 20 - Air freight is all in at Cold Bay, and a substantial portion has been transferred to King Cove. The transfer process is in our hands. 500' ceiling and continued marginal weather expected. Friday June 21 - Weather was clear enough on the north side of the Alaska Peninsula to fly in some gear and begin site preparation on the north side of Pavlof. Low ceiling and drizzle persisted in King Cove.