A 7.7-magnitude earthquake struck central Myanmar on Friday, sending shock waves across a vast expanse of Southeast Asia and causing deaths and damage hundreds of miles away from the epicenter.

The earthquake shook buildings in neighboring Thailand and China, and rattled bridges and homes as far away as Vietnam. At least 23 people have died, and the death toll is expected to rise, especially in Myanmar, where the injured are arriving at hospitals in the country’s second-largest city, Mandalay.

The quake struck near Mandalay, in central Myanmar, at roughly 12:50 p.m. local time, according to the U.S. Geological Survey. Approximately 12 minutes later, an aftershock with a magnitude of 6.4 hit the same area.

Note: Map shows the area with a shake intensity of 4 or greater, which U.S.G.S. defines as “light,” though the earthquake may be felt outside the areas shown. Source: U.S.G.S. By William B. Davis and John Keefe

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