Earthquakes can apparently reverse and strike an area with a second pass – an event known as a “boomerang earthquake” – in rare circumstances.
Scientists recently found evidence of a “boomerang earthquake” in a new study, highlighting an event that occurred in the Atlantic Ocean in 2016.
The quake – which occurred in the Romansh fracture zone – occurred between Brazil and the west coast of Africa. In August 2016, there was an earthquake with a magnitude of 7.1. The tremor traveled in one direction and then returned for a second blow, increasing the speed of the second blow, ScienceAlert reports.
Or, as described elsewhere, “the destruction initially spreads far from the original fracture, but then reverses and goes back the other way at a higher speed,”
“While scientists have discovered that such a theoretical mechanism of destruction is possible from theoretical models, our new study provides some of the clearest evidence for this mysterious mechanism, which arose through real guilt,” said Stephen Hicks, lead researcher and seismologist at Imperial College London. .
“Although the structure of the fault appears simple, the way the earthquake grew was not, and it was the complete opposite of what we expected the earthquake to look like before we began analyzing the data.”
The earthquake had two phases. The first travels east before returning and going west.
This, of course, is the first reported boomerang earthquake incident. It’s so rare that you’re unlikely to find it again unless researchers look for it, according to National Geographic.
The evidence for these events is growing. But more research is needed to find more.
“The theory says it’s there, but it’s pretty hard to see that (in the real world),” said geophysicist Louise Bratston, Ph.D. a researcher at the University of Liverpool in the UK who simulates earthquakes.