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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Sun - 16.3.2015 at 15.54 Järvenpää Observation number 34348

Visibility Unclassified

Keijo Toikkanen, Keski-Uudenmaan Altair

The graph shows three spikes caused by roaring. The first around 11:50 is C1.9, the second around 13 is M1.6. The third rumble shows up just before 4pm and was rated C2. The ruts came from the comma group AR 2297.

Additional information
  • Observation target
    • Sun
    • Luokittelematon
Technical information

Sampo solar storm radio telescope, antenna diameter 60 cm.

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