Solar Section        


November 15, 2011

SWPC Product Subscription Service Changes

UPDATE: To ensure a smooth transition for all of our customers, the change in geomagnetic products originally scheduled for November 16th has been postponed until December 12th. Effective December 12th, 2011, the Space Weather Prediction Center (SWPC) will be making numerous changes to its geomagnetic product suite. SWPC’s nowcast and forecast products, alerts, watches, and warnings will transition to be based on an estimate or prediction of the Planetary indices Kp and Ap. Currently all of these products are based off of the K-index computed from the Boulder magnetometer and the A-index from Fredericksburg, Virginia. The impact of the change should be minimal and no changes to product subscriptions will be required. For more details on the change, please see the customer announcement on our website at:

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