So far, his improvements have held through quakes large and small.

The moving fault beneath, the small quake, and her surface composure cracked.

On its own it can create small quakes.

More than 200 small quakes have been detected in the last 24 hours, officials said.

Ryan recalled what he'd been about to say when the small quake had interrupted him.

"In the last four years, a number of smaller quakes have been flirting with these larger locked patches."

Any small quake has some probability of cascading into a large event.

Instruments pick up areas with frequent small quakes, around magnitude 3.

It was followed by two smaller quakes and nearly 40 aftershocks, the news agency said.

And there must have been smaller quakes, too, right?