Articles tagged "coronal hole"


Coronal Hole directly facing Earth, filament eruption

Aside from a nice filament eruption and a Coronal Hole directly facing Earth, thus allowing solar material to freely rush in our direction, solar activity has been at low levels during last 30 hours.It is expected to remain low with a chance for M-cl

May 13, 2014


Million kilometers long coronal hole appeared in the sun's northern hemisphere

A vast coronal hole stretching more than a million kilometers across the sun's northern hemisphere is facing Earth. A stream of solar wind flowing from this coronal hole (NOAA CH 575) should reach Earth on July 19-20, 2013 so increased geomagnetic activity levels

July 19, 2013


Geomagnetic storm still in progress (June 2, 2013)

The arrival of an interplanetary shock wave on May 31, 2013 caused geomagnetic storming that reached G2 (Moderate) geomagnetic storm levels on NOAA/SWPC storm scale during June 1, 2013. The solar wind speed remains elevated above 650 km/s. Currently, geomagnetic

June 02, 2013


Solar prominences on January 23, 2013

Solar activity remained at low levels for the past 24 hours. However, there were two large prominence eruptions on January 23, 2013. First large prominence erupted from the southern limb in early hours, producing south-directed  CME cloud, away from Earth. It was

January 24, 2013

AR1620 M2_2

Sunspot 1620 generated M2.2 solar flare

Sunspot 1620 produced M2.2 solar flare with peak at 21:36 UTC on November 28, 2012. Fast growing sunspot AR1620 has a beta-gamma-delta magnetic field that harbors energy for X-class solar flares. M-class activity is also possible from region AR 1618 which has now

November 28, 2012


Solar wind stream blowing from big coronal hole, new sunspot regions forming

The dark vertical coronal hole, about 120,000 km wide and more than a million km long, stretches in the center of the Sun. A solar wind stream flowing from the indicated coronal hole should reach Earth on Jan. 16-17, possibly sparking auroras at

January 14, 2012


Large sunspot group harbors energy for M-class solar flares

A large sunspot group is rotating over the sun's northeastern limb, possibly signaling an uptick in solar activity. Measuring some 40,000 km wide and at least twice that in length, the behemoth active region is an easy target for backyard solar

November 02, 2011


Three M-class solar flares at northeast limb

An M1.1 Solar Flare peaked at 15:08 UTC Monday morning and was centered around a new region located on the Northeast Limb. Stay Tuned for increasing solar activity.The second and third M-Class Flares of the day has taken place around the new region hiding on the

October 31, 2011


Incoming coronal mass ejection

As predicted by analysts at the Goddard Space Weather Lab, a coronal mass ejection (CME) hit Earth's magnetic field at ~03:30 UT on Sept 17th. The impact was not strong. Nevertheless, the arrival of the CME could spark geomagnetic activity around the Arctic Circle.

September 17, 2011


Incoming CME and new sunspots

Yesterday, Sept. 14th, an eruption near sunspot 1289 hurled a CME in the general direction of Earth. Analysts at the Goddard Space Weather Lab expect the cloud to deliver a glancing blow to our planet's magnetic field on Sept 17th around 04:30 UT. There are no large

September 15, 2011

Steve McDonough CRW_3333_1315681608_med

Geomagnetic storm continues

New sunspot AR1295 is emerging over the sun's northeastern limb and crackling with solar flares. The strongest so far, a C9.9-category blast, did something remarkable. Click on the arrow to watch an extreme ultraviolet movie from NASA's Solar Dynamics

September 13, 2011

Frank Martin IngilAb DSC02548ml_1315610945_med

Geomagnetic storm in progress

UPDATE: The Geomagnetic Storm has subsided over the past few hours. However, the solar wind remains energized and occasional pulses of activity are expected for another 24 hours. Region 1283, the responsible party back at the Sun, decayed today. The Geomagnetic Storm

September 10, 2011


Expected impact of an incoming solar wind stream

NOAA forecasters estimate a 25% chance of polar geomagnetic activity today in response to the expected impact of an incoming solar wind stream.Solar activity is at very low levels and there is currently no chance for strong solar flares on the earth facing side of

August 29, 2011


Coronal hole in the sun's atmosphere is spewing solar wind toward Earth

 A yawning dark hole in the sun's atmosphere is spewing solar wind toward Earth. NASA's Solar Dynamics Observatory photographed the opening during the early hours of Aug. 26th: Solar wind flowing from this coronal hole is expected to arrive on Aug. 28-29,

August 26, 2011


Double coronal hole spewing high speed stream toward Earth

A double-barreled hole has opened up in the sun's atmosphere and it is spewing a split-stream of solar wind toward Earth. NASA's Solar Dynamics Observatory captured this composite UV image of the double coronal hole on August 20th:Sky watchers should be alert for

August 21, 2011

Cai Uso Wohler Ha2011 08 17 16h00UT 2_1313640485_med

Farside CME activity continues

Solar Activity continues at fairly low levels with only C-Class activity taking place in the past 24 hours. Sunspot 1271 is the largest visible area and it may pose a small threat for an M-Class event.Farside CME activity continues and you can view all of the action

August 19, 2011


Another M-class solar flare

A second M-Class flare, this time a M2.5 took place at 03:54 UTC Tuesday morning around Sunspot 1263. This is in addition to the earlier M3.5 flare which we reported yesterday. The first flare produced a small, but fast moving (2010 km/s) Coronal Mass Ejection...

August 09, 2011


Solar wind hit Earth's magnetic field

A sharp gust of today, June 17th, at approximately 0230 UT. This probably signaled the arrival of a CME, en route from the sun since June 14th.

June 17, 2011


Sunspot 1236 harbors energy for M-class solar flares

The magnetic field of sunspot 1236 harbors energy for M-class solar flares. NOAA forecasters estimate a 25% chance of such an eruption during the next 24 hrs.

June 16, 2011


M1.3 solar flare ejected, CME arrives on June17th

On June 14th around 08:10 UTC, a magnetic filament near the sun's eastern limb became unstable and erupted. The resulting blast hurled a bright and massive CME into space: The expanding cloud was observed by 3 spacecraft: STEREO-A, STEREO-B and SOHO....

June 15, 2011


Solar winds blowing earthward from Sun's new coronal hole

NASA's Solar Dynamics Observatory is monitoring a hole in the sun's atmosphere - a "coronal hole." It is the dark region circled in this extreme ultraviolet image taken during the early hours of April 28th: Coronal holes are places where the sun's magnetic field

April 28, 2011


Coronal holes on the farside of the Sun

For the past week, all eyes have been on the Earth-side of the sun, where sunspots 1158 and 1161-1162 have unleashed some of the strongest flares in years. Meanwhile, the farside of the Sun has been busy, too. Here is the movie from NASA's STEREO-B probe...

February 20, 2011