Damage from the two powerful earthquakes with magnitudes of 6.4 and 7.1 has been picked up by a Japanese satellite. The second earthquake was the strongest to hit Ridgecrest, north-west of Los Angeles in 40 years, according to the USGS. New images from Japan’s Advanced Land Observing Satellite (ALOS-2) satellite has shown the surface displacement in the region.
The satellite uses synthetic aperture radar (SAR) to produce a map showing surface displacement from the earthquakes.
The post-quake imagery was acquired on July 8, 2019, and compared with April 8, 2018, data from the same region.
Each colour cycle represents 4.8 inches (12 centimetres) of ground displacement either toward or away from the satellite.
The linear features that cut the colour fringes in the southeast indicate likely locations of surface rupture caused by the earthquakes, and the “noisy” areas in the northwest may indicate locations where the ground surface was disturbed by them.
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Thousands of aftershocks have been reported in the region since the July 5 quake.
State and federal scientists, including those from the California Geological Survey and USGS, are using this surface deformation map in the field for assessing the damages and mapping the faults that broke during the two major earthquakes as well as the aftershocks.
NASA analysts are using data from satellites to produce visualisations of land deformation and potential landslides, among other earthquake impacts, and are making them available to response agencies.
The shocking pictures come after US President Donald Trump declared the situation in California an emergency.
Trump has ordered federal assistance to help state, tribal and local response efforts in the region.
White House officials said the Federal Emergency Management Agency is authorised to “identify, mobilise, and provide at its discretion, equipment and resources necessary to alleviate the impacts of the emergency.
“Emergency protective measures, limited to direct Federal assistance, will be provided at 75 percent Federal funding.”
Seismologists have said the danger is not over yet, with more aftershocks expected this week.