Many locals perceived an apparent increase in recent earthquake occurrences, though at the time seismologists registered normal levels of seismic activity in the area.

He first used this form of harmonic analysis in 1897 to disprove C. G. Knott's claim of periodicity in earthquake occurrences.

The hazard module calculates harmonised probabilities of earthquake occurrence and resulting shaking at any given location.

A slight increase in earthquake occurrence has occurred in April 2010 with more than 30 earthquakes recorded in the area of the earlier swarm.

The rate of earthquake occurrence in this swarm is not unusual for Yellowstone where more than 80 independent swarms have been identified in the past 25 years.

"Ultimately, if we can understand that, we can understand the physics that regulate earthquake occurrences," Mr. Seeber said.

When a map of earthquake occurrence is superimposed on a map of the sites destroyed in the Late Bronze Age, there is a very close correspondence.

PHIVOLCS is the government agency in charge of conducting volcanic and earthquake monitoring in order to generate data that could be used to predict volcanic eruptions and earthquake occurrences.

Additional constraints for these predictive maps come primarily from three important sources, the availability of which varies depending on the region in which the earthquake occurred, as well as a function of time after the earthquake occurrence.

Some have even claimed to accurately predict earthquake occurrences by observing clouds.