In the United States,there Was Great Concern in the Early

Multiple Choice

In the United States,there was great concern in the early 1980s when earthquakes were frequent,including harmonic tremor,and four magnitude 6 earthquakes caused damage near this volcanic center.

A) Long Valley caldera in California
B) Valles caldera in New Mexico
C) Yellowstone National Park,Wyoming
D) Mt.St.Helens,Washington
E) Crater Lake,Oregon