IPS

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Interplanetary Shock ## ## Message Issue Date: 2026-05-15T13:48:30Z ## Message ID: 20260515-AL-001 ## ## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly. ## Summary: Significant interplanetary shock detected by ACE at L1 at 2026-05-15T07:14Z. The shock is likely caused by the arrival of a coronal hole high speed stream starting on 2026-05-15Z. Some magnetospheric compression likely and moderate geomagnetic storming possible. Activity ID: 2026-05-15T07:14:00-IPS-001. ## Notes: