NASA StreaM

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Interplanetary Shock ## ## Message Issue Date: 2026-05-07T15:54:56Z ## Message ID: 20260507-AL-003 ## ## 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 2026-05-07T15:16Z. The shock may be associated with the arrival of a coronal hole high speed stream on 2026-05-07. Some magnetospheric compression likely and geomagnetic storm possible. Activity ID: 2026-05-07T15:16:00-IPS-001. ## Notes:

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Interplanetary Shock ## ## Message Issue Date: 2026-04-03T15:50:13Z ## Message ID: 20260403-AL-003 ## ## 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 2026-04-03T15:02Z. The shock is likely associated with the CME with ID 2026-04-01T23:45:00-CME-001 (see notifications 20260402-AL-001, 20260402-AL-002, and 20260402-AL-005). Magnetospheric compression and geomagnetic storm possible. Activity ID: 2026-04-03T15:02:00-IPS-001. ## Notes: This arrival signature is still developing and analysis is ongoing.

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Interplanetary Shock ## ## Message Issue Date: 2026-03-20T21:25:41Z ## Message ID: 20260320-AL-004 ## ## 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 2026-03-20T20:17Z. The shock is likely caused by the CME with ID 2026-03-18T09:23:00-CME-001 (see notifications 20260318-AL-002, 20260318-AL-003). Strong magnetospheric compression and geomagnetic storm are also observed (see notification 20260320-AL-003). Activity ID: 2026-03-20T20:17:00-IPS-001. ## Notes: