Pay Attention To Unusual US Earthquakes

A picture of the Earth with an earthquake crack going down the USA and S America

There is an increase in earthquakes worldwide today.

It’s human nature to worry about the large earthquakes happening around the world today, but some of the smaller quakes can be just as intriguing – especially when they occur in odd places.

The Craton

There is an ancient geologic plate boundary that was once the southern seashore in the USA called the Craton boundary.

Craton boundaries are found all over the Earth, and these are the ancient continental boundaries that we can “no longer see.” Rest assured that they are still there, and they are becoming more active as the Earth’s poles shift and reposition the planet’s crust.

The North American Craton runs alongside/parallel to the Appalachian Mountains and turns west in Northern Georgia. It goes through Northern Alabama, Mississippi, Southern Arkansas, Oklahoma, and Northern Texas. At the foothills of the Rockies in Northeastern New Mexico, the Craton boundary shoots north and parallel to the Rocky Mountains through Canada.

A map of the North American Craton boundary.

The North American Craton boundary – Wilipedia

The Craton boundary is the location of the North American continental shoreline over 65 million years old, and earthquakes along this ancient southern plate boundary are increasing in Oklahoma, Texas, Arkansas, and along the Gulf of Mexico and Mississippi River Valley.

This is something that we need to pay attention to.

US Craton Quakes Within the Past 5 Days

  1. Trinidad, Colorado – 2.9 and 2.6
  2. Ridgeville, South Carolina – 2.5
  3. Whitehall, Montana – 2.6
  4. Alamo, Nevada 2.6
  5. Old Faithful Geyser, Wyoming – 3.4, 3.2, 2.7, 2.7, 2.5, 3.6, 2.6 (all on 9/15/13)
  6. Boley, Oklahoma – 3.1
  7. Greenbrier, Arkansas – 2.5
  8. Anthony, Kansas – 2.9

The magnitude doesn’t matter in this case – it’s the LOCATION that matters, and the locations are most intriquing, wouldn’t you say?

We Saw It Coming

On September 14, 2013, the day before the US Craton began to move, their was a major earthquake swarm in the British Virgin Islands and Puerto Rico, Virgin Islands in the Caribbean Sea south of the Craton boundary.

This Virgin Island transform fault zone experienced over 35 earthquakes in less than 12 hours. The quakes stopped once the swarm began at Old Faithful Geyser, Wyoming.

The North American Plate is moving, no doubt.

Heads up, all you States along the Craton. You might want to take your great-grandmother’s antique China bowl down from the top-shelf.



5.7 Quake In Greenville, California Starts Earthquake Swarm

A USGS map of the May 23, 2013 quake in Greenville, California

May 23, 2013 quake in Greenville, California (click to enlarge)

A 5.7 earthquake struck Greenville, California late Thursday night, May 23, 2013, but the quake didn’t stop there.

The Greenville area experienced 62 quakes following the 5.7 rumbler, with the largest quake a 4.9 magnitude.

The initial earthquake was felt in downtown Sacramento, about 145 miles south of the quake’s epicenter.

Juan de Fuca

The next day on May 25, 2013,  more earthquakes occurred off the coast of Oregon (4.0) and in Coldfoot, Alaska (4.4).

The Juan de Fuca Plate is one of the most active, and dangerous, crustal plates on our planet, and it is an area to carefully monitor for both upcoming earthquakes and volcanoes.

A USGS chart and map describing the Juan de Fuca tectonic plate.

The Juan de Fuca Plate off the USA Pacific Northwest – USGS (click to enlarge)

In the Pacific Northwest, the Juan de Fuca Plate plunges under North America. As the denser ocean crust is forced deep into the Earth’s interior beneath the continental plate at the USA’s West Coast (a process known as “subduction”), it encounters high temperatures and pressures that partially melt the rock. Some of this newly formed magma rises toward the Earth’s surface to erupt, forming a chain of volcanoes above the subduction zone.

Between the Pacific and Juan de Fuca Plates is a broad, submarine mountain chain about 500 kilometers long (300 miles) known as the Juan de Fuca Ridge.

The Juan de Fuca Plate will continue to dive beneath Oregon and  the High Cascades, so keep an eye on activity coming from the Juan de Fuca.