Earthquake Intensity Scales
There are two primary methods of grading the intensity of an earthquake:
Richter magnitude scale - assigns earthquakes a number between 1 and 10 in order of increasing intensity
Mercalli intensity scale - assigns earthquakes a number between I to XII based upon the effects of the earthquake (after the fact)
Earth – Seismic / Techtonic Articles
Earthquake Intensity Scale
Earth - Seismic, Tectonic, Faults, Earthquakes
Earthquake Intensity Scales There are two primary methods of grading the intensity of an earthquake: Richter magnitude scale – assigns earthquakes a number between 1 and 10 in order of increasing intensity Mercalli intensity scale [...]
Accretionary Wedge
Earth - Seismic, Tectonic, Faults, Earthquakes
Accretionary Wedge The significance of the Cascadia Subduction is that the Juan de Fuca plate is submerged under the coastal waters of the Pacific Ocean along the western edge of the North American Plate. A [...]
Earth - Seismic, Tectonic, Faults, Earthquakes
Geological Term Glossary
Basin = A low area in the Earth’s crust, of tectonic origin, in which sediments have accumulated, e.g. a circular centrocline such as the Michigan Basin, a fault bordered intermontane features such as the [...]
Earth - Seismic, Tectonic, Faults, Earthquakes
North American Craton
The North American Craton Craton = A part of the Earth’s crust that has attained stability, and has been a little deformed for a prolonged period. As originally defined, cratons included parts of both continents [...]
Earth - Seismic, Tectonic, Faults, Earthquakes
The Cascadia Subduction Zone
The Cascadia Subduction Zone Executive Summary: The significance of the Cascadia Subduction is that the Juan de Fuca plate is submerged under the coastal waters of the Pacific Ocean along the western edge of the [...]
Earth - Seismic, Tectonic, Faults, Earthquakes
Seismic Terms Explained
Seismic Terms Explained Understanding Seismic activity requires a basic understanding of nomenclature (names/terms). If you understand the meaning of the terms otherwise complicated sounding reports and warnings about seismic activity are reasonable simple. Click on [...]
Earth - Seismic, Tectonic, Faults, Earthquakes
Tectonic Plates Explained
The Earth’s Crust is a Conglomeration of Several Tectonic Plates The earths crust is broken up into several large pieces that are referred to as plates. The plates carry continental (land), oceanic (under sea) or [...]
Earth - Seismic, Tectonic, Faults, Earthquakes
Seismic – Top
Seismic Activity and The Effect on Our World & Survival Seismic activity; the most common form of which is an earthquake, is often, but not always related to volcanic activity. Both types of events have [...]
