Scientists Explain an Unusual Tsunami.
A new study published in the journal Nature describes the process that produced and propagated an unusual tsunami following the catastrophic explosion of the Hunga Tonga-Hunga Ha’apai in Tonga in early 2022.
The tsunami that followed the massive eruption of the Hunga Tonga-Hunga Ha’apai volcano on January 15, 2022, is thought by scientists to have been exceptional since it had a worldwide reach, a faster propagation rate, unexpectedly high wave heights, and an unheard-of duration.
“The violent explosion of the Hunga Tonga-Hunga Ha’apai volcano in the South Pacific was a source of both noticeable atmospheric waves and an exceptionally fast-traveling global tsunami with minimal dissipation in the far-field. This was the first time that a volcano-triggered tsunami was globally recorded by modern, worldwide dense instrumentation, thus providing a unique opportunity to investigate the role of air-water coupling processes in tsunami generation and propagation” explains Rachid Omira, first author, a researcher at Instituto Dom Luiz, Faculty of Sciences of the University of Lisbon (Portugal).
Acoustic-Gravity Waves in Tsunami Generation
In this study, the research team looked at satellite, sea-level, and atmospheric data from all over the world and used numerical and analytical models to show that the tsunami was caused by an acoustic-gravity wave that was generated by the volcano explosion and that it traveled several times across the globe. In their conclusions, the scientists provide an exact explanation for the tsunami that was witnessed around the world and make hazard-related recommendations.
“The challenging part of studying the Tonga tsunami was to quantitatively explain all the observed tsunami features that were completely different from those of common tsunamis”, adds Rachid Omira, stating: “A fast-moving atmospheric wave able to excite the ocean surface and pump energy into it was our explanation for this tsunami that “jumped” from an ocean to another and reached the coast of Portugal 10 hours earlier than expected”.
Reference: “Global Tonga tsunami explained by a fast-moving atmospheric source” by R. Omira, R. S. Ramalho, J. Kim, P. J. González, U. Kadri, J. M. Miranda, F. Carrilho and M. A. Baptista, 13 June 2022, Nature.
DOI: 10.1038/s41586-022-04926-4
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4 Comments
Why are we allowing fracking? That seems very dangerous being as we realize that they DO lead to earthquakes. Just my opinion that the people making these decisions obviously have no regard for human lives.
I agree! Greed overrides commonsense displaying a disregard for humans.
Fracking don’t have any relation with earthquake! At least not in all places! In Bahia -Brazil we have more than one thousand terrestrial old wells where fracking is made for decades and we don’t have earthquakes! The petroleum doesn’t stand in a hollow space but like on a rock sponge
They KNOW fracking causes earthquakes and tremors.
Now they have convinced the government to pay them big bucks to inject CO2 into the earth.
They KNOW Injecting CO2 into the earth causes earthquakes.
But they get paid big bucks. And the government and environmentalists should be happy.
They are killing our planet in the name of saving the environment.