Most people think of seismic activity as the result of movement along faults or of violent volcanic eruptions. But seismic events can have other causes, including floods and even large crowds of excited fans—such as those at Taylor Swift’s recent Seattle shows, whose enthusiastic reception caused seismic activity equivalent to a 2.3 magnitude earthquake—and glaciers.
Click here for original story, Washington’s volcanoes are experiencing seismic tremors from an unlikely source—glaciers
Source: Phys.org