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High Speed Stream
Catalog: M2M_CATALOG Event Time: 2025-05-28T23:11Z ( ACE: SWEPAM ) Event End Time: Peak Solar Wind Speed (km/s): 800.0 Date of first appearance of coronal hole in EUV at east limb: 2025-05-20 Note: Beginning of coronal hole high speed stream effects as evidenced by pile-up in increasing solar wind density with a maximum of ~17.9 p/cc near 2025-05-28T23:44Z followed by decreasing density and rapidly increasing wind speed from ~370 km/s to ~630 km/s over the period 2025-05-28T23:11Z to 2025-05-29T01:55Z with increasing temperature profile. At event start 2025-05-28T23:11Z, this coronal hole extends diagonally across a large portion of the disk, spanning across the central meridian from approximately S20W45 to N50E60. Version 1 submitted on 2025-05-29T02:01Z by Tony Iampietro Version 2 submitted on 2025-06-04T16:40Z by Mary AronneNo Notification has been sent for this activity yet. |
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