Lori Dengler is looking for your stories of unique observations around quakes. "I’ve heard of strange smells before, during, or after quakes, headaches, wells suddenly going dry or overflowing, and rivers flowing backwards.

The largest known earthquake to hit the state, with a magnitude of 5.1, occurred in northern Shelby County in 1916, according to the Geological Survey of Alabama. The second biggest was a 4.9 magnitude earthquake in Escambia County in 1997.

A magnitude 7 earthquake has rocked Alaska on Saturday, Dec. 6, according to the United States Geological Survey (USGS).

A rare, ultra-long earthquake in Myanmar revealed that mature faults can deliver their full force directly to the surface. The discovery could mean stronger shaking near faults like California’s San Andreas than current models predict.

A major, 7.0-magnitude earthquake struck near the Alaska-Canada border on Saturday, according to the United States Geological Survey. The temblor happened at 11:41 a.m. Alaska time about 56 miles north of Yakutat, Alaska, data from the agency shows. U.S.G.S. data earlier reported that the magnitude was 6.7.

A powerful magnitude-7.5 earthquake struck off Japan’s northeastern coast on Monday, triggering evacuation orders and a tsunami warning for parts of the coastline.