Earthquake Activity in the Long Valley area

• Past 7 days, including a list of events and link to earthquakes in California
• Past week, updated every Thursday evening, including graph of events in the past year

Tiltmeters

• Longbase tilt data, past 7 days (+NS=South down tilt; +EW=East down tilt)
• Longbase tilt data, past 30 days (+NS=South down tilt; +EW=East down tilt)
• Shortbase tilt data, past 7 days (detrended, +NS=North down tilt; +EW=East down tilt)

Dilational strain

• Past 7 days (Detrended, Pressure loading removed)
• Past 30 days (Pressure loading removed)

Geodetic - 2-color geodimeter

• Data
• Map of two-color benchmarks in Long Valley

Continuous GPS

• USGS GPS continuous data (precision is about 3 mm in horizontal and about 8 mm in vertical
• USGS GPS displacement Vector data

Magnetometers

• USGS Magnetometer data and map of site locations. The instruments measure local changes in the earth's magnetic field. Over short time periods they can detect changes of as small as 1/50,000th of the earth's magnetic field.

Carbon dioxide gas

• Carbon dioxide and helium discharge from Mammoth Mountain

Hydrologic data

• Hot springs, streams, and wells

General information about volcano monitoring techniques

Description of volcano monitoring techniques