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Interplanetary Shock (or CME Arrival)
Catalog: M2M_CATALOG Location: Earth Event Time: 2026-05-07T15:16Z ( ACE: MAG ) Quality of ICME Signature: 2 (clear signatures) Note: Characterized by an initial steep increase in B_total from 4.8nT to 20nT 2026-05-07T18:23Z. A subsequent increase in speed is observed from ~330 km/s to ~420 km/s. Subsequent increases in temperature and density are observed alongside the increases in Btotal and speed. This is likely a signature of the corotating interaction region preceding the clear high speed stream from the equatorial coronal hole which crossed the central meridian on 2026-05-04, with the start of at L1 on the morning of 2026-05-08. If it is concluded that there is an admixture of a CME, the sole possible candidate may be a CME related to an eruption centered near S25E10 starting around 2026-05-04T18:15Z seen in SDO AIA 193. No corresponding CME was visible in coronagraphs, however, as it may have been obscured by the coronagraphs. Version 1 submitted on 2026-05-07T15:51Z by Tony Iampietro Version 2 submitted on 2026-05-08T02:27Z by Mattie Anastopulos Version 3 submitted on 2026-05-09T12:35Z by Anna ChulakiA Notification with ID 20260507-AL-003 was sent on 2026-05-07T15:54Z |
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