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X9.3 earth-directed coronal mass ejection

The wait is over. We finally have a complete set of SOHO/LASCO coronagraph images from today's memorable X9.3 solar flare. If you missed today's space weather events be sure to read this news article before you continue reading here.

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Major X9.33 solar flare

What a day! The strongest solar flare of solar cycle 24 erupted today at 12:02 UTC and of course it was sunspot region 2673 that took center stage. It was a memorable X9.33 solar flare (R3-strong radio blackout) which was highly eruptive as well. We have to go all the way back to 5 May 2015 to find the last time we had an X-class solar flare and it has been 12 years ago since we had a solar flare which was stronger than today's X9.3 event! Not bad considering we are already in the declining phase of solar cycle 24!

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Active geomagnetic conditions

Observed Kp: 4
Threshold reached: 04:39 UTC

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

Edmonton, AB, Gillam, MB, Saskatoon, SK, Whitehorse, YT, Yellowknife, NT
Juneau, AK
The maximum X-ray flux of the past two hours is:
M4.28

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Latest alerts

07:09 UTC - Solar flare

Moderate M4.28 flare from sunspot region 4055

alert


06:48 UTC - Radio Blackout

Minor R1 radio blackout in progress (≥M1 - current: M1.53)


06:24 UTC - Solar flare

Moderate M1.49 flare from sunspot region 4055

alert


06:06 UTC - Radio Blackout

Minor R1 radio blackout in progress (≥M1 - current: M1.16)


04:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 04:29 UTC

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Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/13M1.6
Last geomagnetic storm2025/04/06Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
March 2025134.2 -20.4
April 2025132.1 -2.1
Last 30 days132.4 -10.7

This day in history*

Solar flares
12024M4.3
22002M2.07
32023M1.5
42001M1.47
52002M1.38
DstG
11973-134G4
21981-129G1
31971-121G4
41961-118G3
51990-104G2
*since 1994

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