Mexico earthquake video reveals terrifying sound as it struck capital city.
Mysterious green and blue flashes have been witnessed in Mexico City after it was rocked by a magnitude 8.2 earthquake.
The powerful quake triggered a tsunami warning for at least eight countries and people fled into the streets.
One person took a video of the earthquake light phenomenon which often happens after an earthquake strikes.
Little is known about why they occur and some believe it may be as a result of power supplies being hit while others claim that they have been reported for thousands of years.
Seismologist Stephen Hicks said: ‘Earthquake lights have never been proven. Simpler explanation is small explosions in electric generators and power systems.
Green and blue lights occurred in the night sky over Mexico City (Picture: Twitter/orlaherrera)
It is not clear what causes them and they have never actually been proven (Picture: Twitter/orlaherrera)
Previous sightings of the mystery lights
1930 – Idu earthquake
1975 – Kalapana earthquake
2007 – Peru earthquake
2008 – Sichuan earthquake
2009 – L’Aquila
2010 – Chili earthquake
2014 – Sonoma County, California
2016 – Wellington earthquake
The lights are similar to auroras and can sometimes continue for several minutes after or before the quake.
For example in 1975, the mystery lights appeared during and immediately after the main shock in the Kalapana earthquake in Hawaii.
They come in many colours and forms and people have reported seeing them for hundreds of years but only recently have scientists come a little closer to establishing why they appear.
Why do they occur?
One hypothesis is that the generation of earthquake rocks ‘involves the ionisation of oxygen to oxygen anions by breaking of peroxy bonds in some types of rocks by the high stress before and during an earthquak’, according to a wikipedia page on the subject.
‘After the ionisation, the ions travel up through the cracks in the rocks. Once they reach the atmosphere these ions can ionise pockets of air, forming plasma that emits light.’
Another is that the lights are caused by the result of two layers of the same material rubbing against each other creating voltage.
According to Professor Troy Shinbrot of Rutgers University, who carried out a lab experiment with different types of grains to mimic the crust of the earth, when the layers crack, voltage discharges into the air which then electrifies the air and creates a bright electrical light when it does so.
The mystery lights were last spotted during a 7.8 magnitude earthquake in New Zealand in November last year.
Mexico was rocked by its most powerful earthquake in 32 years, which sparked panic and triggered a 2.3ft Tsunami.
Officials said that it was the strongest quake to hit the capital since the 1985 tremor that killed thousands and flattened a large party of Mexico City.
The earthquake struck around 600 miles away from Mexico City and there were warnings for further waves hitting Mexico, Guatemala, El Salvador, Costa Rica, Nicaragua, Panama, Honduras, Ecuador.
The risk for Hawaii, Guam and other Pacific islands is still being assessed.
Footage emerged from the aftermath shows windows broken and buildings in darkness after the power went out in several major neighborhoods of the capital.
The 8.1 magnitude earthquake struck Mexico City (Picture: Rex)
The cornice of a hotel collapsed in the southern tourist city of Oaxaca, a witness said.
People in the capital, one of the world’s largest cities, ran out into the streets in pijamas and alarms sounded after the quake struck just before midnight, a Reuters witness said.
Helicopters hovered overhead a few minutes later, apparently looking for damage to buildings in the city built on a spongy, drained lake bed.
In one central neighborhood, dozens of people stood outside after the quake, some wrapped in blankets against the cool night air.
Richard Hartley-Parkinson on 8th of September 2017
Source: metro UK