One of the most powerful earthquakes in 2018 has led to the tearing of a tectonic plate

The last strong earthquake in Mexico (September 2018), which had a magnitude of 8.2 degrees on the Richter scale, led to the appearance of strange alloys in the sky, as well as the cracking of a tectonic plate, as recent seismologists have discovered.

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"The fissure spread across the width of the tectonic plate," said seismologist Diego Melgar of the University of Diego.

As the Science Alert recalls, the Puebla-Morelos earthquake had its epicenter in the Pacific Ocean and was felt all over Mexico. Along the shore is the tectonic boundary between the Cocos plaque in the ocean and the North American, Caribbean and Panama plates. So the earthquakes in the region are not new, considering that the edge of the Cocos tectonic plate moves beneath these tectonic plates.

The earthquake called Tehuantepec on September 7, 2018, and the magnitude slightly less than 7.1 degrees Richter on September 19, 2018, are part of a rare earthquake with bent refractive lines. They started normally with the collision between two plates, one of them sliding beneath the other. "But then the Cocos tectonic plate began to penetrate under the Mexican shore and changed its course. It slopes horizontally under the tectonic plate on which Mexico is located, "Melgar said.











source: descopera

Massive underwater earthquake of 7.3 on the Richter scale occurred off the coast of the Philippines

Source:  Daily Mail

A massive 7.3 magnitude underwater earthquake has struck off the coast of the Philippines, it has emerged. The quake, southeast of the island of Jolo , was measured at a depth of 380 miles in the Celebes Sea, the US Geological Survey said. But Philippine seismologists say it was far too deep to cause any damage and casualties or generate a tsunami.

Renato Solidum of the Philippine Institute of Volcanology and Seismology says the quake, which was set off by movement of oceanic plates 387 miles under the seabed, was slightly felt in southern General Santos city.

Solidum says the undersea quake was centered 138 miles southeast of Sulu province and aftershocks were still possible.

The Philippine archipelago lies in the Pacific 'Ring of Fire,' where earthquakes and volcanic activities are common. 

A magnitude 7.7 quake killed nearly 2,000 people on the northern island of Luzon in 1990.





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