Viewing archive of Monday, 4 September 2017 - Sunspot regions

Sunspot regions

Courtesy of SDO, SOHO (NASA) and the [AIA, EVE, and/or HMI] consortium.
Sunspot number New regionsBackground fluxMaximum fluxCM
122 260 -1C2.29M7.9178

Sunspot regions

Region 12673

Number of
sunspots
Size Class Magn. Class Spot Location
12 8 130 70 DSC S10W02
HMIIF
HMIBC

Solar flares on this day

C1.82 C2.66 M1.82 C4.35 C3.44 M1.2 M2.17 C5.9 C8.63 M1.46 M2.5 M2.23 M7.91 M3.08

Region 12674

Number of
sunspots
Size Class Magn. Class Spot Location
21 3 930 120 FHC N14E12
HMIIF
HMIBC

Solar flares on this day

C1.63

Region 12675

Number of
sunspots
Size Class Magn. Class Spot Location
5 1 50 20 CRO S07W63
HMIIF
HMIBC

Region 12676

Number of
sunspots
Size Class Magn. Class Spot Location
6 1 20 BXO S11W51
HMIIF
HMIBC

Region 12677

Number of
sunspots
Size Class Magn. Class Spot Location
2 10 AXX N19E64
HMIIF
HMIBC

All times in UTC

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The solar wind speed is currently moderately high (619.2 km/sec.)

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Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/22M1.3
Last geomagnetic storm2025/04/21Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
March 2025134.2 -20.4
April 2025120 -14.2
Last 30 days111.9 -31

This day in history*

Solar flares
12001M4.66
22022M3.4
32024M2.81
42011M2.64
52004M1.78
DstG
11970-137G3
21988-109G1
32001-102G2
41979-99G2
51997-93G1
*since 1994

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