NASA Sees Monster Sunspot Growing Fast, Solar Storms Possible

A colossal sunspot on the surface of the sun is large enough to swallow six Earths whole, and could trigger solar flares this week, NASA scientists say.

The giant sunspot was captured on camera by NASA's Solar Dynamics Observatory as it swelled to enormous proportions over the 48 hours spanning Tuesday and Wednesday (Feb. 19 and 20). SDO is one of several spacecraft that constantly monitor the sun's space weather environment.

"It has grown to over six Earth diameters across, but its full extent is hard to judge since the spot lies on a sphere, not a flat disk," wrote NASA spokeswoman Karen Fox, of the agency's Goddard Space Flight Center in Greenbelt, Md., in an image description.

The sunspot region is actually a collection of dark blemishes on the surface of the sun that evolved rapidly over the last two days. Sunspots form from shifting magnetic fields at the sun's surface, and are actually cooler than their surrounding solar material.

According to Fox, some of the intense magnetic fields in the sunspot region are pointing in opposite directions, making it ripe for solar activity. Read more >>

A solar 'superstorm' is coming and we'll only get 30-minute warning

A solar "superstorm" could knock out Earth's communications satellites, cause dangerous power surges in the national grid and disrupt crucial navigation aids and aircraft avionics, a major report has found.

It is inevitable that an extreme solar storm – caused by the Sun ejecting billions of tonnes of highly-energetic matter travelling at a million miles an hour – will hit the Earth at some time in the near future, but it is impossible to predict more than about 30 minutes before it actually happens, a team of engineers has warned.

Solar superstorms are estimated to occur once every 100 or 200 years, with the last one hitting the Earth in 1859.

Although none has occurred in the space age, we are far more vulnerable now than a century ago because of the ubiquity of modern electronics, they said.

"The general consensus is that a solar superstorm is inevitable, a matter not of 'if' but 'when?'," says a report into extreme space weather by a group of experts at the Royal Academy of Engineering in London. Read more >>