Q: Stress building up at the same rate over time at a fault causes what phenomenon?


Read this paragraph and choose the correct option from the provided answers:

When an earthquake will occur is much more difficult to predict. Stress on a fault builds up at the same rate over time. So earthquakes should occur at regular intervals. But, so far, scientists cannot predict when quakes will occur even to within a few years. Around Parkfield, California, an earthquake of magnitude 6.0 or higher occurs about every 22 years. So seismologists predicted that one would strike in 1993. But that quake came in 2004—11 years late ( Figure below ).

 Choices:

- erosion

- volcanoes

- storms

- earthquakes


A:
earthquakes