Viewing archive of Sunday, 18 March 2001 - Sunspot regions

Sunspot regions

Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
Sunspot number New regionsBackground fluxMaximum fluxC
91 11B4C4.948

Sunspot regions

Region 9373

Number of
sunspots
Size Class Magn. Class Spot Location
22 -10 230 -10 FAO S07W34

Solar flares on this day

C2.76 C4.95 C4.46 C2.71 C1.2

Region 9376

Number of
sunspots
Size Class Magn. Class Spot Location
4 1 20 CRO S13W04

Region 9383

Number of
sunspots
Size Class Magn. Class Spot Location
1 -3 50 20 HSX S10W82

Region 9384

Number of
sunspots
Size Class Magn. Class Spot Location
9 2 100 -20 DAO N12W35

Solar flares on this day

C2.73

Region 9385

Number of
sunspots
Size Class Magn. Class Spot Location
4 30 DRO S13E42

All times in UTC

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S2 - Moderate solar radiation storm

Infrequent effects on HF radio through polar regions and satellite operations

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Moderate S2 Solar Radiation Storm - Infrequent effects on HF radio through polar regions and satellite operations


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Monthly mean Sunspot Number
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This day in history*

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