Monthly Archives: March 2008

VOLCANO TYPES

Posted on March 17, 2008 by Rashid Faridi

GENERIC FEATURES A volcanic vent is an opening exposed on the earth’s surface where volcanic material is emitted. All volcanoes contain a central vent underlying the summit crater of the volcano. The volcano’s cone-shaped structure, or edifice, is built by … Continue reading →

Posted in Volcanoes | 1 Comment

The Modified Mercalli Scale

Posted on March 17, 2008 by Rashid Faridi

In seismology a scale of seismic intensity is a way of measuring or rating the effects of an earthquake at different sites. The Modified Mercalli Intensity Scale is commonly used in the United States by seismologists seeking information on the … Continue reading →

Posted in Uncategorized | 3 Comments

Richter Scale

Posted on March 17, 2008 by Rashid Faridi

Seismologists use a Magnitude scale to express the seismic energy released by each earthquake. Here are the typical effects of earthquakes in various magnitude ranges: Earthquake Severity Richter Earthquake Magnitudes Effects Less than 3.5 Generally not felt, but recorded. 3.5-5.4 … Continue reading →

Posted in seismic activities | 5 Comments

Seismic Waves

Posted on March 17, 2008 by Rashid Faridi

Seismic Deformation When an earthquake fault ruptures, it causes two types of deformation: static; and dynamic. Static deformation is the permanent displacement of the ground due to the event. The earthquake cycle progresses from a fault that is not under … Continue reading →