RUSSIAN RIDGE — At the summit of Rolph Hill, in a corner of the Russian Ridge
Open Space Preserve closed to the public, stands an alien-looking machine — a
small white dome balanced on three long 'legs' sunk deep into moss-covered
bedrock.
Inside is a small, powerful GPS receiver that's measuring the
movement of the earth via satellite every 15 seconds and a cellular modem that
sends the data hundreds of miles away. Scientists are using it to calculate
earthquake hazards across the San Andreas Fault, which lies a few miles to the
east."
Unforced variations: July 2025
1 day ago
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