Partial Eclipse Over Manila Bay
What’s happened to the setting Sun?
An eclipse! The Moon eclipsed part of the Sun as visible from parts of Africa, Australia, and Asia. In particular the above image, taken from the Mall of Asia
seawall, caught a partially eclipsed Sun setting over Manila Bay in the Philippines.
A massive solar eruption may lead to the strongest radiation storm in seven years
Last week, a swelling solar storm on the surface of the Sun sent a stream of charged particles hurtling toward Earth, making for beautiful northern lights in the planet’s extreme latitudes. But late last night, at 10:59 p.m. EST, the now massive tempest unleashed an eruption that scientists expect will be responsible for Earth’s largest solar radiation storm since 2005.
How powerful are we talking? The National Oceanic and Atmospheric Administration (NOAA) says that many plane flights scheduled for tomorrow can expect to be re-routed within the next few hours.
Cause for concern is due to the M9-class solar flare that was observed lashing out last night from a large sunspot — dubbed “1402” — on the Sun’s northeastern hemisphere. The image you see up top reveals the extreme flash of ultraviolet radiation that was emitted by the sunspot, as captured by NASA’s Solar Dynamics Observatory [Click here for a mesmerizing hi-res version].
The explosion’s M9-ranking puts it just below the threshold of an X-flare, the most powerful classification of solar eruption there is. It’s important to understand that while flares more violent than 1402’s are often observed on the surface of the Sun, it’s rare for one so powerful to eject subatomic particles in a wave aimed so directly at Earth; analysts at the Goddard Space Weather Lab have released an animated forecast track [click through to see], which shows the leading edge of the particle ejection reaching Earth tomorrow morning, shortly after 9 a.m. EST (1400 GMT).
SpaceWeather.com reports the particles emitted by last night’s solar flare could “cause isolated reboots of computers onboard Earth-orbiting satellites and interfere with polar radio communications.” According to Kathy Sullivan, deputy administrator of NOAA, polar flights scheduled for tomorrow here on Earth are expected to be re-routed within the next few hours, so as to avoid any complications caused by the storm’s arrival.
This image shows a comparison of HMI Quick-Look continuum images from January 2012 (right) and July 2011 as seen by NASA’s Solar Dynamics Observatory. The two horizontal lines show how high the sun appears today. When those lines are extended to the left, the July image is a little over 3 percent smaller.
Image courtesy ESA/NASA
In late November the sun went into overdrive, producing about a dozen coronal mass ejections in just eight days. The above frame shows some of the larger solar eruptions as seen by NASA’s Solar and Heliospheric Observatory, or SOHO, spacecraft.
The dark rings are created by SOHO’s coronagraph, an instrument used to block out the main body of the sun so that the probe can see structures in the sun’s fainter upper atmosphere, or corona.
Corresponding pictures of the sun were later scaled down and superimposed on the coronagraph images.
Published December 9, 2011