Hi Juliet. Here is a paper that covers low-pressure areas associated with earthquakes. It points out that the Loma Prieta and the Northridge quake occurred during a low-pressure condition. However both quakes were associated with faults. One fault was known; the other was unknown until the quake occurred.

One would have to take a look at all of the areas around the world at the various low-pressure areas and see how many quakes occur. Then look at the areas of high-pressure and see how many quakes occur. Take Care…Don in creepy town

Observed Natural Events And Hypotheses Related To The Physics Of Fault-Free Earthquakes
by Timothy J. Kelly III
(Copyright December 13, 1994)

ABSTRACT

This paper introduces a set of hypotheses which incorporates many unexplained events surrounding what shall be defined as Type II earthquakes (EQ). I propose that rather than only one type of EQ, there are actually several types of EQs occurring on the planet. Fault-free EQs are not confined to fault lines, but occur in many diverse locations. This assertion is based on the inference that Type II EQs are electromagnetic in nature.

The foundation of the main hypothesis is that the dew formation process returns previously generated, airborne static electricity to the ground. This process brings about a regional atmospheric electrical equilibrium. After approximately three consecutive dewless nights, the potential for the ultra low frequency radio waves in the atmosphere to discharge (in a modified vortex shape) to the ground increases greatly. If the conditions are right (i.e. windless, so that the charges gather), the electromagnetic vortex, eddy currents, and gravity factors combine to create vertical movement of the earth at the epicenter, gradually shifting to a sinusoidal shape as the waveform propagates from the epicenter. The initial waves, which usually last approximately 40 seconds, terminate after regional atmospheric electrical equilibrium is attained. If dew forms after one, or two consecutive days of charge build-up, the atmosphere returns to a state of equilibrium.

In addition to the process of reaching atmospheric electrical equilibrium by dew formation, several fuzzy elements also alter the preconditions. These elements have both direct and indirect links to the process of equalizing regional airborne atmospheric electrical potential.

• Type II Earthquakes