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Prediction Detail

Prediction for CME (2018-08-19T07:36:00-CME-001)

CME Observed Time: 2018-08-19T07:36Z
CME Note: SIDC: In SoHO/LASCO C2 coronagraph images a very narrow (only around 10 degrees angular width) CME is visible from August 19 7:36UT onwards, directed towards the South-West. It is also visible from Stereo A COR2, also narrow and directed to the South-West from this viewpoint. The arrival time for this CME could have been confused with the arrival time of the 2018-08-20T21:24Z CME.
CME Shock Arrival Time: 2018-08-24T05:50Z
Observed Geomagnetic Storm Parameters due to CME:

Predicted Arrival Time: 2018-08-21T23:00Z (-4.0h, +3.0h)
Prediction Method: WSA-ENLIL + Cone (BoM)
Prediction Method Note:
CME associated with DSF observed in Learmonth GONG H-alpha ~05:30UT on 19 Aug. Glancing blow with very slight increase in solar wind speed and density expected.
Speed: 715 km/s
Cone half angle: 23
Lat: 14S
Long: 22W
Lead Time: 96.08 hour(s)
Difference: 54.83 hour(s)
Prediction submitted by Duty Forecaster (ASFC) on 2018-08-20T05:45Z
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Important Disclaimer Notice

If you are looking for the official U.S. Government forecast for space weather, please go to NOAA's Space Weather Prediction Center ( This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.

NASA Official: Dr. Maria Kuznetsova
Curator: Chiu Wiegand