Earth's magnetosphere helps shields the planet from solar wind. At high latitudes, incoming particles can enter the atmosphere and produce the aurora. Stronger solar events can create short-lived disturbances that induce geoelectric fields in the ground.

In the Basin & Range Province, GPS measurements reveal prolonged extension—from infinitesimal motion in eastern Utah to about 6.5 mm/year in western Nevada. The effects of this slow, steady stretching can be observed in the presence of nearly parallel mountain ranges and valleys in the landscape.

As Hurricane Melissa makes landfall in Jamaica, we can see its approach over the past few days on seismometers. Strong winds generated by hurricanes create ocean waves and pressure fluctuations that cause stronger up and down movements in the water column, which seismometers record.

Electrical resistivity tomography (ERT) is a method for learning about the ground below our feet. It can help with finding pumpable groundwater, areas of pollution, hidden caves, and much much more.

Watch our full video on ERT: https://loom.ly/LTB_gs8

On this day in 1989, a magnitude 6.9 earthquake struck the Bay Area during the World Series game between the San Francisco Giants and Oakland Athletics. Known as the Loma Prieta earthquake, it caused widespread damage, but the timing of the game likely prevented many additional fatalities.

Today kicks off #EarthScienceWeek! This year's theme celebrates "Energy Resources for Our Future," and we've put together a great set of materials, including a brand new video, on how clean energy technologies use geophysics to help image the world hidden beneath our feet.
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https://loom.ly/btNQeYI

A M7.4 earthquake struck off the southern Philippines on October 10. Where the Philippine Sea Plate dives beneath the Sunda Plate, complex subduction on both sides of the Philippines archipelago makes the region highly seismically active.

Explore more & access event data: https://loom.ly/GHCi3lg

International #ShakeOut Day is one week away! On Thursday, October 16 at 10:16 am (local time), join millions of people around the world practicing earthquake safety. Register and learn more at shakeout.org.

Be prepared and practice your Drop, Cover, and Hold On!

This simple model illustrates how resonance can sometimes cause buildings of certain heights to see the most damage during an earthquake.

Classroom resources ➡️ https://loom.ly/w0ghACs