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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG Location: STEREO A Event Time: 2026-04-22T02:42Z ( STEREO A: IMPACT ) Quality of ICME Signature: 1 (lacks some signatures) Note: A data gap in the real-time data is observed from 2026-04-21T20:10Z to 2026-04-22T02:42Z. The start time of this event therefore corresponds to the first time that data becomes available and may not be the true start time of this event. This signature is likely associated with the arrival of a corotating interaction region preceding the 2026-04-22 high speed stream. The signature is characterized by an amplification of magnetic field components, with Btotal reaching a maximum of 20 nT, as well as an increase in density to ~5 p/cc which begins to decrease to <1 p/cc as the coronal hole high speed stream arrives. The candidate coronal hole reached the central meridian of the STEREO A-facing disk on 2026-04-19 and spans approximately S20 to N40. Version 1 submitted on 2026-04-22T15:24Z by Mattie Anastopulos Version 2 submitted on 2026-04-28T20:22Z by Mary AronneNo Notification has been sent for this activity yet. |
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