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Prediction for CME (2025-03-01T18:24:00-CME-001)CME Observed Time: 2025-03-01T18:24ZiSWAS Layout URL: https://kauai.ccmc.gsfc.nasa.gov/DONKI/view/CME/37629/-1 CME Note: This CME is visible to the SE in SOHO LASCO C2, C3, and STEREO A COR2 imagery with a very bright core mostly on the right side of the CME. The source is a large L-shaped filament eruption stretching from ~S35W10 to ~S15E40 centered around ~S35E20 starting around 2025-03-01T17:00Z. Brightening is visible in SDO/AIA, GOES SUVI, and STEREO A EUVI 304. Dimming, moving/opening field lines, and post-eruptive arcades are best visible in GOES SUVI 284 and SDO/AIA 193. --- Arrival Notes: Characterized by a slow rise in Bt from around 4nT to a peak of 8.9nT at 2025-03-05T22:23Z. Bz largely swings between northward and southward throughout the signature, briefly sustaining southward around -7.5nT from 2025-03-05T19:38Z-2025-03-05T21:58Z. An small sustained increase in wind speed from around 460km/s to 490km/s is observed alongside an initial temperature and density bump. Speed and temperature slowly decrease as the signature plays out and density slowly increases. This is likely the expected glancing blow of CME 2025-03-01T18:24Z, anticipated at L1 at 2025-03-04T16:00Z (+- 7 hours). CME Shock Arrival Time: 2025-03-04T17:10Z Observed Geomagnetic Storm Parameters due to CME: ---- Predicted Arrival Time: 2025-03-04T15:00Z Predicted geomagnetic storm max Kp range due to CME: 5.0 - 6.0 Prediction Method: WSA-ENLIL + Cone (NOAA/SWPC) Prediction Method Note: Please enter the following information for your prediction: SWPC ENLIL settings: ENLIL version: 2.9e Resolution: medium Ambient settings: a8b1 Ejecta settings: d4t1x1 WSA version: 2.2 GONG: mrbqs CME input parameters Time at 21.5Rs boundary: Radial velocity (km/s): Longitude (deg): Latitude (deg): Half-angular width (deg): Notes: Product: Forecast Discussion Issued: 2025 Mar 03 1230 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center ... Solar Wind .24 hr Summary... Solar wind parameters were indicative of waning positive polarity CH HSS influence. Total magnetic field strength reached 9 nT and the Bz component was mostly northward throughout the period. Solar wind speeds decreased from ~550 km/s to between ~450-500 km/s over the past 24 hours. The Phi angle was positive. .Forecast... Mostly nominal solar wind conditions are expected to prevail for the remainder of 03 Mar through early 04 Mar. Enhanced conditions are likely by midday on 04 Mar, through early 05 Mar, due to the anticipated arrival of a CME that left the Sun on 01 Mar. Geospace .24 hr Summary... The geomagnetic field was at quiet levels throughout the period as positive polarity CH HSS influences diminished. .Forecast... The geomagnetic field is expected to be at quiet levels on 03 Mar. Periods of G1 (Minor) geomagnetic storming are likely, with a chance for G2 (Moderate) levels, on 04-05 Mar due to the anticipated arrival of a CME that left the Sun on 01 Mar. ~~~~ Product: Forecast Discussion Issued: 2025 Mar 03 0030 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center ... Solar Wind .24 hr Summary... Solar wind parameters were indicative waning positive polarity CH HSS influence. Total magnetic field strength ranged between 2-7 nT and the Bz component was mostly northward. Solar wind speeds steadily declined from ~600 km/s to ~445 km/s over the past 24 hours. Phi angle was predominantly oriented in the positive sector. .Forecast... Solar wind conditions are expected to remain slightly enhanced over 03 Mar due to waning positive polarity CH HSS influence. A stronger solar wind enhancement is likely by midday on 04 Mar due to the anticipated arrival of a CME that left the Sun on 01 Mar. ~~~~ Product: Forecast Discussion Issued: 2025 Mar 02 1230 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center Solar Activity .24 hr Summary... Solar activity remained at low levels. The strongest flare of the period, a C9.5 at 01/2301 UTC, originated from an unseen source on or beyond the SE limb. Region 4007 (S10W24, Dao/beta) continued to exhibit growth while Region 4009 (N12E01, Dso/beta) began to show signs of decay. New Regions 4011 (S19E51, Axx/alpha), 4012 (S13E68, Cao/beta), and 4013 (S04E67, Axx/alpha) were numbered. The remaining regions on the visible disk were either stable or in decay. Other activity included a filament eruption in the SE quadrant that began at around 01/1700 UTC. The subsequent CME, first observed in LASCO/SOHO C2 imagery at 01/1812 UTC, was analyzed to have an Earth-directed component. Model guidance suggests this CME is likely to arrive at Earth around midday on 04 Mar. ~~~~ Product: Forecast Discussion Issued: 2025 Mar 02 0030 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center Solar Activity .24 hr Summary... Solar activity was at low levels. The strongest flare of the period, a C9.5, came from a yet-to-be-numbered area near the SE limb at 01/2301 UTC. Region 4010 (N24E19, Bxo/beta) produced an impulsive C6.4/Sf at 01/0830 UTC. Region 4009 (N11E10, Dso/beta) and Region 4007 (S10W18, Dao/beta) both exhibited growth. The remaining numbered active regions on the visible disk were either mostly stable or in decay. New regions of flux were observed rotating on to the SE quadrant. Other activity included the eruption of a filament channel in the SE quadrant, which began around 01/1700 UTC. Subsequent LASCO/SOHO C2 imagery contained a CME signature beginning at 01/1812 UTC. Analysis and modelling of the event is ongoing to determine if an Earth-directed component was produced. ~~~~Lead Time: 60.53 hour(s) Difference: 2.17 hour(s) Prediction submitted by Hannah Hermann (M2M SWAO) on 2025-03-02T04:38Z |
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