A large solar flare on Thursday was expected to lead to heightened aurora activity this weekend but not as far south as Colorado. One Thornton resident however appears to have captured images of the northern lights Sunday morning.
The images by Justin Whitesel show a purple sky over the city as the geomagnetic storm hits the Earth. You can view an animation Whitesel put together here.
An X1.4 flare was observed on the sun by NASA's SDO on Thursday, July 12, 2012.
The coronal mass ejection (CME) that resulted from the solar flare on Thursday has begun hitting the Earth. Satellite and terrestrial stations began picking up the increase in geomagnetic activity at around 1:00pm MDT Saturday.
The solar flare was a significant one as is the CME however it is not expected to be powerful enough to have any ill effects on earth. More significant events can affect satellites and even bring down power grids.
Here on Earth the most notable effect will be an increase in aurora activity. Unfortunately it doesn’t appear the CME is strong enough to push the aurora down to Colorado but areas across the northern latitudes of the contiguous United States may be treated to a show.
NASA depiction of a solar flare and the resultant coronal mass ejection (CME) hitting the Earth. (NASA)
A very large solar flare erupted on the Sun yesterday and the Coronal Mass Ejection (CME) is speeding toward the Earth right now. It is expected to arrive early Saturday morning (4:30am MDT + / – 7 hours) and if you can get away from the city lights, even northern Colorado has a chance to see the heightened aurorae. Here is some good background info on solar flares and CMEs from NASA.
Space weather starts at the Sun. It begins with an eruption such as a huge burst of light and radiation called a solar flare or a gigantic cloud of solar material called a coronal mass ejection (CME). But the effects of those eruptions happen at Earth, or at least near-Earth space. Scientists monitor several kinds of space “weather” events — geomagnetic storms, solar radiation storms, and radio blackouts – all caused by these immense explosions on the Sun.
One of the most common forms of space weather, a geomagnetic storm refers to any time Earth’s magnetic environment, the magnetosphere, undergoes sudden and repeated change. This is a time when magnetic fields continually re-align and energy dances quickly from one area to another.
Geomagnetic storms occur when certain types of CMEs connect up with the outside of the magnetosphere for an extended period of time. The solar material in a CME travels with its own set of magnetic fields. If the fields point northward, they align with the magnetosphere’s own fields and the energy and particles simply slide around Earth, causing little change. But if the magnetic fields point southward, in the opposite direction of Earth’s fields, the effects can be dramatic. The sun’s magnetic fields peel back the outermost layers of Earth’s fields changing the whole shape of the magnetosphere. This is the initial phase of a geomagnetic storm.
The next phase, the main phase, can last hours to days, as charged particles sweeping into the magnetosphere accumulate more energy and more speed. These particles penetrate closer and closer to the planet. During this phase viewers on Earth may see bright aurora at lower latitudes than usual. The increase – and lower altitude – of radiation can also damage satellites traveling around Earth.
The final stage of a geomagnetic storm lasts a few days as the magnetosphere returns to its original state.
Geomagnetic storms do not always require a CME. Mild storms can also be caused by something called a corotating interaction region (CIR). These intense magnetic regions form when high-speed solar winds overtake slower ones, thus creating complicated patterns of fluctuating magnetic fields. These, too, can interact with the edges of Earth’s magnetosphere and create weak to moderate geomagnetic storms.
Geomagnetic storms are measured by ground-based instruments that observe how much the horizontal component of Earth’s magnetic field varies. Based on this measurement, the storms are categorized from G1 (minor) to G5 (extreme). In the most extreme cases transformers in power grids may be damaged, spacecraft operation and satellite tracking can be hindered, high frequency radio propagation and satellite navigation systems can be blocked, and auroras may appear much further south than normal.
Solar Radiation Storms
A solar radiation storm, which is also sometimes called a solar energetic particle (SEP) event, is much what it sounds like: an intense inflow of radiation from the sun. Both CME’s and solar flares can carry such radiation, made up of protons and other charged particles. The radiation is blocked by the magnetosphere and atmosphere, so cannot reach humans on Earth. Such a storm could, however, harm humans traveling from Earth to the moon or Mars, though it has little to no effect on airplane passengers or astronauts within Earth’s magnetosphere. Solar radiation storms can also disturb the regions through which high frequency radio communications travel. Therefore, during a solar radiation storm, airplanes traveling routes near the poles – which cannot use GPS, but rely exclusively on radio communications – may be re-routed.
Solar radiation storms are rated on a scale from S1 (minor) to S5 (extreme), determined by how many very energetic, fast solar particles move through a given space in the atmosphere. At their most extreme, solar radiation storms can cause complete high frequency radio blackouts, damage to electronics, memory and imaging systems on satellites, and radiation poisoning to astronauts outside of Earth’s magnetosphere.
Radio Blackouts
Radio blackouts occur when the strong, sudden burst of x-rays from a solar flare hits Earth’s atmosphere, jamming both high and low frequency radio signals. The X-rays disturb a layer of Earth’s atmosphere known as the ionosphere, through which radio waves travel. The constant changes in the ionosphere change the paths of the radio waves as they move, thus degrading the information they carry. This affects both high and low frequency radio waves alike. The loss of low frequency radio communication causes GPS measurements to be off by feet to miles, and can also affect the applications that govern satellite positioning.
Radio blackouts are rated on a scale from R1 (minor) to R5 (extreme). The strongest radio blackouts can result in no radio communication and faulty GPS for hours at a time.
Coronal Mass Ejection as viewed by the Solar Dynamics Observatory on June 7, 2011. (NASA/SDO) Click the image for a larger version.
A massive solar flare was unleashed today by the Sun in an impressive display captured in stunning imagery and video. These events can be very hazardous to the Earth but NASA said due to the direction of the eruption, we will escape most of its effects.
The flare was part of a three-hour long event that peaked at 1:41am EDT (11:41pm MDT). Captured on film and video by NASA’s Solar Dynamics Observatory (SDO), the display is amazing.
The large cloud of particles is seen spewing an incredible cloud of magnetic plasma into space. It then rains back down on an area covering half of the surface of the sun.
Did you know you can monitor space weather right here on ThorntonWeather.com? Check it out!
Earth appears to have been spared the effect of the coronal mass ejection (CME). Some such events can be damaging to electronics including satellites and vulnerable power grids. NASA said the CME is expected to arrive late on June 8th or 9th and auroras at higher latitudes may be more pronounced.
This X-ray photo of the Sun was taken by NASA's Solar Dynamics Observatory (SDO) on Sunday morning, August 1st. The dark area near the top right edge is a filament of plasma being ejected, part of the coronal mass ejection (CME). The bright region on the left half is an unrelated flare. (NASA) Watch video of the ejection at the link below.
A large solar flare on Sunday is expected to strike the Earth tonight treating sky watchers in the northern United States to a display of aurorae. The increased activity is being monitored by NOAA’s Space Weather Prediction Center (SWPC) in Boulder.
The ejection of charged particles from the sun follows a period of relative calm in terms of solar activity. What is being termed a “solar tsunami” – a wall of charged ion particles – is expected to trigger a geomagnetic storm visible in the northern latitudes.
The aurorae, normally only visible at extreme northern latitudes, are expected to put on a show for areas as far south as the northern contiguous United States the nights of August 3rd and 4th.
Unfortunately for those in Colorado, the phenomena won’t be strong enough to reach the state. But, those in Oregon, Montana, North Dakota and other states further north should be able to witness the event.
