SpaceWeatherLive .com
Real-time auroral and solar activity

Viewing archive of Wednesday, 27 June 2012

Solar activity report

Previous rotation Previous day Calendar
Next day Next rotation
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2012 Jun 27 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 179 Issued at 2200Z on 27 Jun 2012

IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z

Solar activity was low. Regions 1512 (S15E11) and 1513 (S15E58) each produced low-level C-class flares as well as occasional optical subflares. Region 1512 showed spot and penumbral growth in its intermediate portion along with an increase in magnetic complexity and was classified as a Dki/beta-gamma. Region 1513 showed a minor increase in spot count during the period and was classified as a Cso/beta. New Regions 1514 (S16E55) and 1515 (S16E70) were numbered and were classified as a Bxo/beta and Cso/beta, respectively. Region 1515 produced occasional optical subflares during the latter half of the period. No Earth-directed coronal mass ejections were observed during the period.
IB. Solar Activity Forecast
Solar activity is expected to be low through the period (28 - 30 June) with a chance for an M-class flare.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was quiet with unsettled to active periods detected at high latitudes.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet on day 1 (28 June). Field activity is expected to increase to quiet to unsettled levels on day 2 (29 June) with a chance for active levels due to the arrival of a co-rotating interaction region in advance of a coronal hole high-speed stream (CH HSS). A further increase to unsettled to active levels is expected on day 3 (29 June) with a chance for minor storm levels due to CH HSS effects.
III. Event Probabilities 28 Jun to 30 Jun
Class M25%25%25%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       27 Jun 106
  Predicted   28 Jun-30 Jun  110/115/115
  90 Day Mean        27 Jun 118
V. Geomagnetic A Indices
  Observed Afr/Ap 26 Jun  007/009
  Estimated     Afr/Ap 27 Jun  004/005
  Predicted    Afr/Ap 28 Jun-30 Jun  006/007-009/010-015/018
VI. Geomagnetic Activity Probabilities 28 Jun to 30 Jun
A. Middle Latitudes
Active10%15%25%
Minor storm01%01%10%
Major-severe storm01%01%01%
B. High Latitudes
Active20%20%15%
Minor storm20%25%30%
Major-severe storm10%20%40%

All times in UTC

Previous rotation Previous day Calendar
Next day Next rotation

<< Go to daily overview page

Back to top

Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future

Gillam, MB, Whitehorse, YT, Yellowknife, NT
Fairbanks, AK

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Edmonton, AB, Iqaluit, NU, Saskatoon, SK
Anchorage, AK, Juneau, AK

Current data suggests there is a slight possibility for aurora to appear at the following middle latitude regions in the near future

Calgary, AB, Winnipeg, MB
The strength of the interplanetary magnetic field is moderate (10.08nT), the direction is slightly South (-5.69nT).
The Disturbance Storm Time index predicts moderate storm conditions right now (-51nT)

S1 - Minor solar radiation storm

Minor impacts on HF radio through polar regions

Latest news

Latest forum messages

Temporary Topic - Ongoing Solar Proton Events 7Unspecified geomagnetic activity 2183AR4049 3AR4048 83Interacting with Cactus 3
More topics

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

Donate SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

04:03 UTC - Hemispheric Power Index

The OVATION model predicts the Hemispheric Power Index to reach 50GW at 04:56 UTC

01:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 01:32 UTC

alert

Tuesday, 1 April 2025
22:51 UTC - Solar flare

Moderate M2.5 flare

alert

22:30 UTC - Radio Blackout

Minor R1 radio blackout in progress (≥M1 - current: M1.45)

07:15 UTC - 10cm Radio Burst

Begin Time: 01/04/2025 06:45 UTC Maximum Time: 01/04/2025 06:45 UTC Duration: 1 minutes. Peak flux: 190 sfu

Get instant alerts!

Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/01M2.4
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
April 2025147 -7.6
Last 30 days128.8 -21.8

This day in history*

Solar flares
12001X28.5
22001X2.01
32001X1.59
42014M9.35
52017M8.22
DstG
11960-272G3
21973-173G3
32001-101G1
41976-101G1
51994-96G3
*since 1994

Social networks