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  • Irish Chronicles Document Links Between Volcanoes and Weather
    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong corr...Read more

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    Irish Chronicles Document Links Between Volcanoes and Weather

    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong correlation between the occurrence of volcanic eruptions and extreme cold weather in Ireland over a 1200 year period. Data analyzed in this study cover the period from 431 to 1649, during which time up to 48 volcanic eruptions are identified in Greenland ice core records through deposition of volcanic sulfate in annual layers of ice. You can find the study (open access), published on 6 June 2013 in IOP Publishing's journal Environmental Research Letters, at http://iopscience.iop.org/1748-9326/8/2/024035/article. Find out more about how volcanoes can influence climate.
  • EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US
    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, acco...Read more

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    EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US

    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, according to the National Weather Service in Norman Oklahoma. The tornado, which remained on the ground for 40 minutes and reached 2.6 miles across (4.2 km), took the lives of 18 people including storm chasers Tim Samaras, Paul Samaras and Carl Young. For more information on the tornado, visit http://ow.ly/i/2hfDG.
  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
A pyramid eclipses the Sun.
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Courtesy of Corel Corporation

Total Solar Eclipse - Coming Soon!
News story originally written on February 23, 1998

There is a solar eclipse coming to a movie theater near you! Actually, this is better than a theater! This is the real thing! There will be a total solar eclipse on February 26th. The total eclipse will be visible mainly in the Carribean islands. But much of South America and the southern and eastern United States will able to see a partial eclipse.

This is NASA's chance to study the Sun's corona. The corona of the Sun is only visible from Earth during solar eclipses...so this is a unique chance! NASA will look at the Sun's corona from telescopes here on Earth. Satellites in space will be used to check these earth-based observations. The NASA/ESA SOHO (Solar and Heliospheric Observatory) spacecraft and the NASA/ESA Ulysses spacecraft will help verify earth-based eclipse observations. The Ulysses spacecraft is in polar orbit around the Sun right now which gives this spacecraft a "birds-eye view" of the Sun's corona. Ulysses is likely to see huge loops of material tearing away from the Sun's corona (again, we only see these from Earth during a solar eclipse). These loops are extremely important because they can cause an increase of space weather storms!

One way to view this solar eclipse is to watch the coverage on NASA TV. If you are outside during the eclipse (from about 16:00-18:00 UT), never look directly at the Sun! Here are some solar eclipse viewing tips...

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The Spring 2011 issue of The Earth Scientist is focused on modernizing seismology education. Thanks to IRIS, you can download this issue for free as a pdf. Print copies are available in our online store.

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