Volcano Monitoring: MAUNA LOA ( GG130 ) Geophysics (Deformation via GPS and InSAR, Seismicity, etc. )

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Presentation transcript:

Volcano Monitoring: MAUNA LOA ( GG130 ) Geophysics (Deformation via GPS and InSAR, Seismicity, etc. )

Mauna Loa deformation patterns and sources

Interferometric Synthetic Aperture Radar (InSAR) – derived deformation: Each color cycle represents ½ of a wavelength’s worth of deformation, and for this particular radar system, the wavelength is 5.6 cm

Mauna Loa Seismic Monitoring

Mauna Loa Seismic Activity for the past year

Mauna Loa Earthquake Density for the past 50 years

Mauna Loa shallow (<5km) Earthquake Activity for the past 50 years.

Mauna Loa shallow (<5km) Earthquake Activity for the past 50 years: More shallow earthquakes recently, or better equipment? Earthquake magnitude

Mauna Loa shallow (<5km) Earthquake Activity for the past 50 years. Cumulative number of earthquakes

To normalize for differences in earthquake detection thresholds, we can count earthquakes scaled by their relative energy release. Earthquake energy scales by 10 ^(3M/2) (where M is the magnitude). So, a magnitude 4.0 earthquake has the equivalent energy of 10 ^(3/2) ≈ 32 magnitude 3.0 earthquakes

Mauna Loa shallow (<5km) Earthquake Activity for the past 50 years. Cumulative m 3.0 equivalent earthquakes

Mauna Loa shallow (<5km) Earthquake Activity for the past 50 years. Cumulative m 3.0 equivalent earthquakes