M4.2 earthquake - Alamagan region, Northern Mariana Islands

What happened

A magnitude 4.2 earthquake struck Alamagan region, Northern Mariana Islands on 23 Dec 2017, 23:00 UTC at a depth of 397 km.

Earthquakes of this size are classed as Light. Widely felt nearby; objects may shake or fall. Significant damage is unusual. This was a deep earthquake; shaking at the surface is usually weak for its size.