Category Archives: Plate Tectonics

Further thoughts on the Northwest Megaquake-Tsunami Risk.

Posted on July 29, 2015 by Richard Rollo

There was more fallout from the New Yorker Magazine story “…everything west of the I-5 is toast” controversy.  I was going to post a video from RAW which showed TV news coverage on the Northwest Megaquake-Tsunami Risk, but the video … Continue reading →

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4.2 Earthquake in Fontana this morning

Posted on July 25, 2015 by Richard Rollo

As reported on local television station KTLA, the earthquake struck at 5:45 AM in the Fontana area of San Bernardino County as shown on the map above. The location was less than a mile from the Metrolink station.   It … Continue reading →

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Seattle, Northwest in Danger of a Megaquake?

Posted on July 20, 2015 by Richard Rollo

An article in the July issue New Yorker Magazine by Kathryn Schultz has apparently scared the bejeezes out of people in the Northwest. One of the pull quotes from the article was that “everything west of the i-5 will be … Continue reading →

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7.3 Landers Earthquake 1992

Posted on July 13, 2015 by Richard Rollo

The earthquake that struck Landers, California June 28, 1992, was the largest earthquake to have occurred in the continental United States in the last half of the 20th Century (or since.) according to the USGS.  As can be seen on … Continue reading →

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What it’s like to experience an Earthquake II: The 1989 San Francisco Earthquake.

Posted on June 30, 2015 by Richard Rollo

I remember this earthquake, formally known as the Loma Prieta Earthquake,  mostly because I had just finished dinner with my parents and they sat down to watch the third game of the World Series between the San Francisco Giants and … Continue reading →

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What it’s like to be in an Earthquake

Posted on June 17, 2015 by Richard Rollo

What’s it like to be in an earthquake?  Although the 1987 Whittier Narrows Earthquake and it’s aftershocks were not the most powerful earthquakes as measured by the Richter Scale at 5.9 .  It was the closest  Earthquake so far in proximity … Continue reading →

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3.4 Earthquake near Gardena in the Los Angeles Basin

Posted on June 8, 2015 by Richard Rollo

                            We had a 3.4 (Richter Scale) earthquake in the Los Angeles Basin late Saturday night.  It was at a depth of 7.2 miles.  I felt this … Continue reading →

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Northern California Earthquakes last week retracted by USGS

Posted on June 1, 2015 by Richard Rollo

I don’t recall this ever happening before.  Last week there were a series of earthquakes reported in both Northern and Southern California.  I didn’t bother with them because they were 5 and below on the Richter Scale and low level … Continue reading →

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Magnitude 6.7 Earthquake in the Aleutian Archipelago during the night.

Posted on May 29, 2015 by Richard Rollo

                  The epicenter was 400 miles southwest of  Anchorage, Alaska, and 20 miles down in the Earth.  It struck around Midnight Pacific time.  No tsunami is expected at this time.  For more … Continue reading →

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Another volcano erupts this time in Southern Japan

Posted on May 28, 2015 by Richard Rollo

                NHK, the Japanese Television Network, reported today that the volcano Kuchinoeabu-Jima on an island south of the main island had an explosive eruption.  Officials issued an evacuation warning for the island.  Here … Continue reading →

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