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Solar wind
speed: 352.8 km/sec
density: 6.0 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: M6
1953 UT Nov01
24-hr: M6
1953 UT Nov01
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 01 Nov 13
Sunspot AR1884 has a 'beta-gamma-delta' class magnetic field that harbors energy for X-class solar flares. Credit: SDO/HMI
Sunspot number: 128
What is the sunspot number?
Updated 01 Nov 2013

Spotless Days
Current Stretch: 0 days
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 821 days
Typical Solar Min: 486 days

01 Nov 2013

The Radio Sun
10.7 cm flux: 143 sfu
explanation | more data
Updated 01 Nov 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 2.7 nT
Bz: 2 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 01 Nov 13
Solar wind flowing from the indicated coronal hole could reach Earth on Nov. 5-7. Credit: SDO/AIA. is now posting daily satellite images of noctilucent clouds (NLCs), which hover over Earth's poles at the edge of space. The data come from NASA's AIM spacecraft. The north polar "daisy" pictured below is a composite of near-realtime images from AIM assembled by researchers at the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).
Noctilucent Clouds
Switch view: Europe, USA, Asia, Polar
Updated at: 09-02-2013 11:55:02
NOAA Forecasts
Updated at: 2013 Nov 01 2200 UTC
0-24 hr
24-48 hr
30 %
30 %
05 %
05 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2013 Nov 01 2200 UTC
0-24 hr
24-48 hr
10 %
10 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
20 %
15 %
10 %
10 %
Friday, Nov. 1, 2013
What's up in space

When is the best time to see auroras? Where is the best place to go? And how do you photograph them? These questions and more are answered in a new book, Northern Lights - a Guide, by Pal Brekke & Fredrik Broms.

Northern Lights - a Guide

WHAT DOES DEEP SPACE SOUND LIKE? As Voyager 1 recedes from the solar system, researchers are hoping the spacecraft will beam back tones from plasma waves, a form of "interstellar music" that reveals conditions in the realm of the stars. Find out what deep space sounds like in a new video from Science@NASA.

M6-CLASS FLARE: Sunspot AR1884 is directly facing Earth, and it has a mixed-polarity magnetic field that harbors energy for strong eruptions. On Nov. 1st at 1953 UT the active region unleashed a brief but intense M6-class solar flare. NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash:

Although the flare was aimed directly at Earth, its effect on our planet was minimal--mainly because the duration was so short (less than 1 minute). A brief blackout of HF radio signals might have occured on the daylit side of Earth, while low-frequency navigation signals could have been disrupted for ~tens of minutes. Any such disruptions have since subsided.

Sunspot AR1884 poses a threat for longer and stronger flares this weekend. NOAA forecasters estimate a 40% chance of M-class flares and a 5% chance of X-class flares on Nov. 2nd and 3rd. Auro alerts: text, voice.

Realtime Aurora Photo Gallery

GREEN SPOOKTACLE: As expected, a coronal mass ejection (CME) hit Earth's magnetic field during the early hours of Oct. 31st, Halloween. The impact, however, was not strong enough to spark a geomagnetic storm or widespread auroras. Instead, unexpectedly, auroras appeared before the impact. Observing from Troms, Norway, Chris and Becki Nation photographed this spooky scene on Oct. 30th:

"AMAZING display last night!" says Chris. "We had a 360 degree light show. It was absolutely breathtaking and we didn't know which way to point the camera."

Becki adds, "we are a family of 6 utter Aurora Addicts: Chris, Becki, Aurora 10, Oceanna 8, Lyrica 3 and Caspian 1. We are currently planning a 4 month road trip in our camper van to Lapland this season from our home in the south of the UK. Things are about to get very green."

But not right away. The geomagnetic field is expected to be mostly quiet for the next 3 days (Nov. 1 - 3). A CME from active sunspot AR1884 could change that forecast, however, so stay tuned. Aurora alerts: text, voice.

Realtime Aurora Photo Gallery

SPACE WEATHER BALLOON UPDATE: Members of the Earth to Sky Calculus science club have recovered the space weather balloon they launched on Oct. 27th. The payload, which landed in a remote area of California's Inyo Mountains, carried two high-energy radiation sensors into the stratosphere. These pictures show the erupting balloon and one of the sensors at the apex of the flight, 27 km (90,500 feet) above Earth's surface:

The reading on the LCD screen shows a dose rate of 3.7 uSv/hour, more than 20 times higher than radiation levels at the launch site. Another independent sensor was contained inside a thermally insulated capsule. Working together, the two sensors measured a complete profile of ionizing radiation from 2.8 km to 27 km above Earth's surface.

This experiment was prompted by a recent NASA report concerning the effects of space weather on aviation. Like astronauts, ordinary air travelers can be exposed to significant doses of radiation when the sun is active. The Oct. 27th flight showed that it is possible to count x-rays, gamma-rays, alpha particles and beta particles using relatively inexpensive equipment. Such data can be used to check and improve research models of radiation percolating through Earth's atmosphere.

Another balloon flight could be in the offing. Solar activity is high, and a new fusillade of X-flares could trigger a radiation storm around Earth. If so, the student scientists plan to send their sensors back to the stratosphere for another look. Solar flare alerts: text, voice.

Realtime Space Weather Photo Gallery

Realtime Comet ISON Photo Gallery

Realtime Aurora Photo Gallery

  All Sky Fireball Network
NEW: Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA's Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth's atmosphere and many other characteristics. Daily results are presented here on

On Nov. 1, 2013, the network reported 11 fireballs.
(9 sporadics, 2 Orionids)

In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]

  Near Earth Asteroids
Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time.
On November 1, 2013 there were 1437 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2013 UX2
Oct 25
0.4 LD
6 m
2013 UV3
Oct 29
0.7 LD
18 m
2013 UJ9
Nov 1
4.9 LD
20 m
2013 UE1
Nov 7
7.4 LD
60 m
2000 DK79
Nov 10
49 LD
3.0 km
2011 JY1
Nov 13
8.2 LD
57 m
2001 AV43
Nov 18
3 LD
52 m
2010 CL19
Nov 25
37.6 LD
1.3 km
2013 NJ
Nov 26
2.5 LD
190 m
2011 YD29
Dec 28
6.1 LD
24 m
Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach.
  Essential web links
NOAA Space Weather Prediction Center
  The official U.S. government space weather bureau
Atmospheric Optics
  The first place to look for information about sundogs, pillars, rainbows and related phenomena.
Solar Dynamics Observatory
  Researchers call it a "Hubble for the sun." SDO is the most advanced solar observatory ever.
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Solar and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
Daily Sunspot Summaries
  from the NOAA Space Environment Center
  the underlying science of space weather
Space Weather Alerts
  more links...
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