Viewing archive of Thursday, 17 September 1998 - Sunspot regions

It appears that the image of the visible solar disk for this day in history is missing.
Sunspot number New regionsBackground fluxMaximum flux
100 142 -1B5.14C1.06

Sunspot regions

Region 8328

Number of
sunspots
Size Class Magn. Class Spot Location
1 10 -30 AXX S15W89

Region 8330

Number of
sunspots
Size Class Magn. Class Spot Location
1 0 -20 AXX S24W52

Region 8331

Number of
sunspots
Size Class Magn. Class Spot Location
3 -9 20 -30 BXO N26W45

Region 8335

Number of
sunspots
Size Class Magn. Class Spot Location
6 1 110 -80 DAO S22E14

Region 8336

Number of
sunspots
Size Class Magn. Class Spot Location
2 40 CSO S30E52

Region 8337

Number of
sunspots
Size Class Magn. Class Spot Location
2 10 BXO S39E42

Region 8338

Number of
sunspots
Size Class Magn. Class Spot Location
1 90 HSX N31E81

All times in UTC

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Last X-flare2026/03/30X1.5
Last M-flare2026/04/04M1.3
Last geomagnetic storm2026/04/03Kp7- (G3)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
March 202685.9 +7.7
April 2026133.3 +47.4
Last 30 days96.9 +35.1

This day in history*

Solar flares
12002M8.82
22026M7.6
31999M6.76
42001M2.91
52003M2.74
DstG
11979-202G3
21988-133G3
31984-120G4
42004-117G2
51994-111G3
*since 1994

Aurora on this day in history

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