Northern California experienced back-to-back earthquakes on February 13, with a 3.4-magnitude quake followed closely by a 3.2-magnitude tremor. Both quakes originated near Hayward, prompting over 1,300 residents across the region to report sensations of shaking. Notably, the area had previously recorded a 2.7-magnitude quake earlier the same morning. Experts note that quakes of magnitude between 2.5 and 5.4 are commonly felt but typically result in minimal damage. The article also provides safety tips for responding to tremors, emphasizing the best practices to adopt during an earthquake.
"Oh, it WAS an earthquake in the East Bay," one user on X wrote. "Hayward fault is practically in my backyard so no wonder it felt pretty strong."
Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says. It replaces the old Richter scale.
Quakes between 2.5 and 5.4 magnitude are often felt but rarely cause much damage, according to Michigan Tech. Quakes below 2.5 magnitude are seldom felt by most people.
Earthquakes’ sudden, rapid shaking can cause fires, tsunamis, landslides or avalanches. They can happen anywhere, but they're most common in Alaska, California, Hawaii, Oregon, Puerto Rico and Washington.
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