Atmosphere

dark red noctilucent clouds sweden 2020 pm heden earth to sky calculus

Rare dark red noctilucent clouds appear over Sweden

Rare dark red noctilucent clouds appeared over Vallentuna, Sweden on July 25, 2020, and were recorded by P-M Heden. This type of NLCs is rare and not fully understood, Dr. Tony Phillips of the SpaceWeather.com reports. Research in the 1970s revealed that much of the...

July 28, 2020

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Major noctilucent clouds outbreak over Europe

Observers across Europe, from Scandinavia to the Adriatic coast, are reporting major noctilucent clouds (NLC) outbreak on July 5 and 6, 2020. The outbreak comes on the heels of July 4th sighting over southern California, U.S. -- where in 2019 a record was set for...

July 06, 2020

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NASA's ICON mission releases first batch of data on Earth's ionosphere

NASA's ICON mission team has released its first batch of observations of the ins and outs of the Earth's ionosphere--the dynamic region high in the planet's atmosphere where terrestrial weather meets space weather. The satellite is designed to study...

June 28, 2020

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'Extraordinary' lightning megaflashes in Brazil and Argentina set new distance and duration records

A 16-second flash of lightning in Argentina on March 4, 2019, and a 700 km (435 miles) bolt in Brazil on October 31, 2018, set new records for the greatest lightning duration and longest bolt ever, respectively, according to the World Meteorological Organization...

June 26, 2020

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Rare noctilucent clouds appear during summer solstice over London, England

Rare noctilucent clouds (NLCs) put on a spectacular display over London, England, on June 21, 2020-- during the summer solstice. "Even the bright lights of the London Eye on the River Thames couldn’t drown out the display," said Phil Halper, a...

June 24, 2020

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The largest Saharan dust cloud in 50 years engulfs the Caribbean, air quality at record hazardous levels

Massive Saharan dust cloud is engulfing the Caribbean as it heads toward the U.S., with air quality across much of the region falling to record hazardous levels. The phenomenon is described to be the most significant in 50 years, according to environmental health...

June 24, 2020

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'Abnormally large' plume of Saharan dust makes it to the Caribbean, to reach South U.S. this week

A massive dust cloud from the Sahara continues its westward progression and has moved over the Lesser Antilles, the eastern Caribbean Sea, and Puerto Rico as of June 21, 2020. The dust plume, which is described by scientists as an abnormally large cloud, is forecast...

June 22, 2020

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Massive plume of Saharan dust moving over the Atlantic Ocean toward the Caribbean and U.S.

An expansive plume of dust from the Sahara continues to move over the Atlantic Ocean and is forecast to spread to the Caribbean by the weekend. It may also reach the Gulf of Mexico and parts of the U.S. by next week. The Saharan Air Layer (SAL) usually forms from...

June 18, 2020

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Giant jellyfish red sprites captured over the Czech Republic

Giant red sprites resembling jellyfish were captured over the skies in the Czech Republic on June 13, 2020. According to SpaceWeather.com, sprite season is underway in Europe and more atmospheric bullseyes are in the offing. Czech photographer Daniel...

June 15, 2020

volcano june 12 2020

Classic hypothesis revived... decline of oxidizable volcanic gases as the trigger for Great Oxidation Event

It's commonly believed that oxygen first accumulated in the atmosphere about 2.4 billion years ago, when the Great Oxidation Event happened. Geologic clues indicate that early bacteria were pumping out oxygen hundreds of millions of years before then, but...

June 13, 2020

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Record cold in mesosphere causes noctilucent clouds to spill out of Arctic into mid-latitudes

Temperatures at the mesosphere have been breaking 14-year records over the past few days, according to Lynn Harvey of the University of Colorado Laboratory for Atmospheric and Space Physics. This causes noctilucent clouds to spill across the Arctic and descend to...

June 11, 2020

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Early start of the 2020 noctilucent cloud (NLC) season

The Northern Hemisphere noctilucent cloud (NLC) season has officially begun. The first cloud was detected by NASA's AIM spacecraft inside the Arctic Circle on May 17. The detection marks one of the earliest starts in the 14-year history of the spacecraft. ...

May 23, 2020

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Red sprites and airglow over West Texas

A large column of red sprites and airglow put on a fantastic display over West Texas on May 13, 2020. The phenomenon was captured by Stephen Hummel of the McDonald Observatory. A line of storms more than 161 km (100 miles) away generated the astonishing display in...

May 18, 2020

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Strong advection of Saharan dust from North Africa into Europe

A huge load of Saharan dust is moving across the Mediterranean Sea into SE Europe on May 14, 2020, with additional deposits expected in the coming days. According to Severe Weather Europe (SWE) meteorologists, the dust may also reach the UK and Ireland over the...

May 14, 2020

delhi dust storm may 10 2020

Massive dust storm barrels through Delhi, India

Sunny morning skies went dark by noon as massive dust storm enveloped Delhi, India, in a sudden change of weather on Sunday, May 10, 2020. The storm came after the city recorded the season's second hottest temperature -- 40.9 °C (105.6 °F). "This...

May 11, 2020

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2020 northern hemisphere NLC season forecast

Public interest for noctilucent clouds rose sharply in 2019 after record-setting outbreak across the northern hemisphere. The 2020 season is expected to start mid- to late-May or early June, but at the moment, it doesn't seem like 2020 will be a repeat of 2019....

May 11, 2020

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Understanding how natural hazards impact our upper atmosphere and cause variations in the space environment

A new study shows that natural hazards on Earth, specifically earthquakes and tsunamis, can create much more disturbances in the ionosphere than previously assumed. The researchers studied the catastrophic 2011 M9.0 Tohoku earthquake and tsunami in Japan, and found...

May 06, 2020