In the midst of a bizarre winter, Montrealers were treated to a rare sight on Monday night — a winter thunderstorm. Montrealers Jolyane Limoges and Pierre-Marc Doucet managed to capture the phenomenon during a snow squall, and post it on YouTube. The phenomenon is known as thundersnow — it's like a normal thunderstorm, but with snow as the primary form of precipitation. Thundersnow events happen when a mass of cold air settles on top of warm air, coupled with moist air closer to the ground.
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Airplanes get hit by lightning mid-flight! Contrary to what you might believe, it’s a common occurrence on airplanes.
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On the 21st of August 2011, a thunderstorm forced the pope to cut short his speech to an estimated 1 million young pilgrims gathered at a Madrid airfield to mark World Youth Day. As rain soaked the crowd and lightning lit up the night sky on Saturday, the 84-year-old pontiff skipped the bulk of the speech and delivered brief greetings in half a dozen languages.
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Lightning is an impressive, energetic force of nature — so why aren't we using all that raw power to run our homes? Two reasons: For one thing, lightning is unpredictable and really, really fast. The second part of the answer: It's hot and loud and bright, but lightning doesn't carry as much energy as you might think.
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More than 400 people were killed in southern Egypt, most of them when blazing fuel flooded into a village from a depot struck by lightning in a rainstorm. Lightning struck the depot's eight fuel tanks toward the end of the storm that raged across much of Egypt for up to five hours.
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A 36-year-old diver was killed off a Florida beach after lightning struck his oxygen tank, authorities have said. The man was diving with three others off a boat near Deerfield Beach on Sunday. When he surfaced, ‘lighting struck his tank,’ said Deerfield Beach fire Chief Gary Fernaays. ‘He was approximately 30 feet from the boat at the time.’
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1. Direct strike 2. Side flash 3. Ground current 4. Conduction 5.Streamers
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In 1769 a single lightning bolt killed 3000 people in Brescia, Italy, and caused a large part of the city to be destroyed! Over 200,000 pounds of explosives were stored in the Church of San Nazaro on Brescia when a single lightning bolt struck its tower. The resulting explosion and fire killed 3000 people and destroyed a large part of the city.
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In a rare incident of its kind, a coastguard diver and a citizen were killed after they were struck by a lightning bolt off Khairan beach of Kuwait on the 8th of May 2016. The Interior Ministry said in a statement that a jet ski of citizen Saad Khaled Al-Shereeda broke down and a coastguard boat was dispatched to rescue him. The ministry added that the coastguard diver, Abdullah Othman Al-Doussary, jumped in the water to help the man, but they were both struck by lightning and were killed instantly. In October last year, an Asian was killed by lightning in northern Kuwait during a freak storm. It is estimated that 6,000 to as many as 24,000 people are killed around the world by lightning strikes every year.
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The plane carrying the Spanish national football team home from the World Cup in Brazil was struck by lightning on the 22nd of June 2014 as it approached its landing in Madrid, adding to the streak of bad luck the team seemed to be on after its World Cup defeat.
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On 2015, during an August thunderstorm, Google lost data by lightning strikes! Google says data has been wiped from discs at one of its data centres in Belgium - after the local power grid was struck by lightning four times.
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According to research from RACQ nearly half of Queensland, Australia drivers will speed to avoid hail damage to their cars. The motoring club and insurer's research revealed 47% of motorists admitted to speeding to avoid hail damage to their cars - up from 44% last year. The research also found female drivers were more likely to speed (54.2%) than males (52%) when a storm hits.
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All 11 members of a football team were killed by a bolt of lightning at during a match in the Democratic Republic of Congo. According to a Congolese newspaper that reported the incident, the other team was left unharmed!
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Mini-lightning may flash in the coldest craters on the moon, melting and vapourising soil. All that sparking could have altered the surface as much as impacts from incoming rocks and dust. The outer layer of the moon is a sort of history book recording the interactions between the moon and the rest of the solar system. To correctly interpret that history, we need to understand the mechanisms that shape it.
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Roy Cleveland Sullivan was a United States park ranger in Shenandoah National Park in Virginia. Between 1942 and 1977, Sullivan was hit by lightning on seven different occasions and survived all of them. For this reason, he gained a nickname "Human Lightning Conductor" or "Human Lightning Rod". Sullivan is recognized by Guinness World Records as the person struck by lightning more recorded times than any other human being. He died from a self-inflicted gunshot wound at the age of 71 over an unrequited love.
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A massive 19th century storm in the pacific United States opened up a 300-mile-long sea that stretched through much of the central part of California. For 43 days, from late 1861 to early 1862, it rained almost nonstop in central California. Rivers running down the Sierra Nevada mountains turned into torrents that swept entire towns away.
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What was that strange light in the sky? Many people overnight reported seeing strange lights in the sky, a phenomenon that has been reported for centuries before, during, and after earthquakes. Seismologists aren't in agreement about the causes of the hotly-debated phenomenon - called earthquake lights or, sometimes, earthquake lightning. And, of course, it's not clear whether the lights overnight in New Zealand were the phenomenon, or something else. One theory suggests dormant electrical charges in rocks are triggered by the stress of the Earth's crust and plate tectonics, transferring the charge to the surface where it appears as light. Historical reports include globes, or orbs, of glowing light, floating just above the ground or in the sky. Much like tidal research, it is an area that is notoriously difficult to investigate. Tidal stresses and their effects on the Earth are minute, but measurable, although many seismologists remain unconvinced by theories of "tidally triggered" earthquakes. With "earthquake light", the phenomenon is also notoriously difficult to observe, study, and measure.​ GNS seismologist Caroline Holden said there were anecdotal reports of lights in the sky. "Unfortunately, we cannot measure this phenomena or its extent with our instruments to provide a clear explanation," she said. The phenomenon has been documented for centuries. Hypotheses have suggested the movement of rocks could generate an electric field, others suggest quakes can lead to rocks conducting electromagnetic energy and a subsequent build up of electric charges in the upper atmosphere. Yet another theory suggests a link between the electric charge, or current, released by the earth ripping and buckling below the surface, and the magnetic properties of rock. The charge appears as light, so the theory goes. People reported similar strange lights in the sky during the 2011 Christchurch earthquake. In 1888, before a large quake around the Hanmer region, a strange glow in the sky was reported by observers. One recent study documented hundreds of sightings of strange light, glowing, and aurora-like reports, from 1600 to the 19th century. The study in the Seismological Research Letters suggested a charge builds up in rock inside the Earth's crust and, as it becomes rapidly unstable in a quake, expands outward. In an earthquake, the electrical charge transfers from below the surface to the surface, or above, depending on the conductivity of the rock - appearing as light. "When such an intense charge state reaches the Earth's surface and crosses the ground–air interface, it is expected to cause [an electric transmission and breakdown] of the air and, hence, an outburst of light. "This process is suspected to be responsible for flashes of light coming out of the ground and expanding to considerable heights at the time when seismic waves from a large earthquake pass by." The study said some seismologists also think the theory could account for other phenomena, such as changes to electrical fields, strange fog, haze, clouds, and low-frequency humming or radio frequency emission. In the study, the researchers found the light was more often associated with a type of quake in which tectonic plates are wrenched apart, known as a "rift" earthquake
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A lightning storm rages almost constantly at the mouth of the Catatumbo River in northern Venezuela, with bolts striking up to 280 times per hour for 10 hours a day, on 260 nights every year. That's 28 lightning strikes per minute for those nights - and about 1.2 million lightning strikes each year. Venezuela, home of the delicious pabellón criollo, has been experiencing the Catatumbo lightning for hundreds of years now. It comes from storm clouds that amass more than 3,200 feet above the spot where the Catatumbo River flows into Lake Maracaibo. According to meteorologists, winds going across the lake and its surrounding swamps are likely responsible for the storms. The swamps are plains surrounded by mountains - the Andes (home of the first cultivation of quinoa), the Perijá Mountains, and the Cordillera de Mérida - and the combination of heat and moisture in the area creates electrical charges that - when met with wind destabilized by the mountain ridges - turns into lightning and thunderstorms. Light flashes from the storm can be seen up to 25 miles away, earning the phenomenon the nickname "The Maracaibo Beacon," and it's been used by ships for navigation as a result. The frequency of the lightning strikes changes both within the year and from one year to the next. October's wet season is peak time for the storms, while they generally calm down in January and February. In fact, there was a break in the storm due to a drought between January and March of 2010, and locals feared that the phenomenon was over for good. The Catatumbo lightning holds a special place in the heart of Venezuelans, because it may have been partially responsible for the nation's independence. An attempted surprise attack led by British navigator Sir Francis Drake on the Spanish army was spoiled by the bright lightning one night in 1595, a story that was later recounted in Lope de Vega's epic La Dragontea a few years later. Years later, in the early nineteenth century, the Spanish army itself attempted a sneak attack on Maracaibo in order to take back the country towards the end of the Venezuelan War of Independence. Again, the Catatumbo lightning lit up the landscape, thwarting the invasion and allowing Venezuela's beloved revolutionary hero, Simón Bolívar, and his fleet to win one of the last and most important battles in the wars against the Spanish for independence. The Catatumbo lightning has also been responsible for producing more ozone at the mouth of the Catatumbo than any other place in the world. Scientists have expressed doubt, however, that this will have any effect on the world's ozone layer, due to the lightning's instability. Its effect on tourism, however, is not in doubt, as sightseers have flocked to the region to join nighttime tours to see the lightning. It's a great addition to any South American itinerary.
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Lightning can produce X-rays and gamma radiation. In the past, researchers thought that this phenomenon only lasted for a very short time, about a ten thousandth part of a second. However, the ionizing radiation of lightning appears to shine much longer than presumed: an afterglow of gamma radiation arises, which lasts up to 10,000 times longer. This is demonstrated for the first time by computer simulations of researchers from Centrum Wiskunde & Informatica (CWI) in Amsterdam. Their article 'TGF afterglows: a new radiation mechanism from thunderstorms' was published on 22 October 2017 in the scientific journal Geophysical Review Letters. This discovery can provide more insight into how lightning develops. Terrestrial gamma flashes ‘Terrestrial gamma flashes’ were discovered about two decades ago. When lightning starts, electrons can be accelerated to very high energies, which cause an explosion of gamma radiation when these electrons crash into air molecules: the so-called terrestrial gamma flashes'. Bursts of up to a trillion (‘a billion billion’) gamma particles are measured on the ground, in airplanes and by satellites. However, these measurements are difficult, since these bursts are very focused and only last for a short time, around 0,0001 seconds. There is still much unknown about how these terrestrial gamma flashes arise and what their role is in the development of lightning. The now discovered afterglow helps to study this phenomenon. Afterglow in all directions CWI researcher Casper Rutjes explains what happens in the newly discovered radiation mechanism. “The radiation of a terrestrial gamma flash is so strong that nuclear reactions can take place. When the gamma rays hit the atomic nuclei of the air molecules, the protons and neutrons, of which atomic nuclei exist, can be detached. The loose neutrons can wander longer and farther than protons because they don’t have electrical charge. After a while, the neutron is captured by another atomic nucleus, which can again produce gamma radiation. The high energy of the gamma ray flash, which is used in releasing neutrons, is, so to speak, temporarily stored in the released neutrons.” The CWI researchers calculated that in this way an afterglow of new gamma radiation occurs, which lasts for 1,000 to 10,000 times longer than the gamma ray flash itself and which is not focused but radiates into all directions, which facilitates measurements. Afterglow measured The CWI researchers found in the scientific literature hardly any measurements that corresponded to the predictions, because almost no one was done on the right time scale. Researcher Casper Rutjes says: “Recently, our simulations have also been confirmed by experiments. Almost simultaneously, G.S. Bowers et al. of the University of California Santa Cruz, have measured a clear afterglow of gamma ray flashes in Japan, after a lightning bolt struck a wind turbine. That article, ‘Gamma-ray signatures of neutrons from a terrestrial gamma-ray flash’, also appeared now in the scientific journal Geophysical Review Letters. Radiation risk About the radiation risk Rutjes says: “The chance of being hit directly by a terrestrial gamma ray flash is very small. If someone in a plane is hit directly by such a narrow terrestrial gamma ray flash, this person will receive a radiation dose approximately equal to 400 times an X-ray picture (30 mSv)[1]. The afterglow that we discovered radiates into all directions, increasing the chance that a plane flying above a thunderstorm is hit, but fortunately, that radiation is much weaker. The radiation dose of the afterglow after lightning is not dangerous: less than passengers already receive through background radiation when they fly for an hour.” The research was conducted by Casper Rutjes, Gabriel Diniz, Ivan Ferreira and Ute Ebert from Centrum Wiskunde & Informatica (CWI) in Amsterdam, and it was funded by the Netherlands Organisation for Scientific Research (NWO).
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Upward lightning strikes initiate on the ground and head skyward. These discharges, which usually begin at the top of tall and slender structures, pose a real risk for wind turbines. An EPFL study analyzes the mechanisms underlying this poorly understood phenomenon.
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