Do precursors exist before large

earthquakes?

Colin Price

Department of Geosciences

Electromagnetic Precursors

Fraser-Smith (1990)

AC Magnetic Field

Sensor 7km from Epicenter!

Radon in Underground Water

11 March 2011 Tohoku‐Oki earthquake

-1hr -20min -1min

GPS Satellites TEC

(Total Electron Content)

40 minute warning!

Atmospheric Anomalies

(Heki and Enomoto, 2013)

China (Magnitude 7.3)

4 February 1975

Snakes came out of hibernation (winter)

and froze/died days before large earthquake

Town evacuated saving 150,000 lives

Animals Sense Something….

(Wang et al., 2006)

Future research

Har Amram

Dead Sea

Mount Hermon

TAU

network

Problems:

Lots of noise,

signals weak

Few large earthquakes

Don’t know location

of next earthquake

Possible Solution?

24 hours of data locations

Future…..

• Fusion of many data sets

• High Spatial resolution

• High temporal resolution

• Real time analysis

• Advancing science on natural hazards

• ….