| --- |
| Solar Activity |
| --- |
| .24 hr Summary... |
| Solar activity was moderate, but did decrease some over the past 24 |
| hours, with four low-level M-class events observed. The visible solar |
| disk remained littered with sunspot groups, with fourteen designated |
| spot groups at this time and making some sunspot region locations |
| difficult to ascertain in several cases - especially with the many spot |
| clusters in the far southwest. That large area of spot groups consists |
| of five groups in close proximity and shifting areas of magnetic |
| connection. |
| Region 3650 (S11W45, Bxo/beta) appeared to drift away from other spot |
| clusters in the area and decayed considerably. Region 3643 (S12W56, |
| Eac/beta-gamma) was adjusted notably based on latest magnetic analysis |
| and spot configuration - thus despite the large areal coverage |
| difference from previous reports, the spots underwent minor growth. |
| Region 3645 (S08W71, Dki/beta-gamma) underwent some decay, but did |
| produce the largest flare of this reporting period, an M2.9 at 23/1744 |
| UTC. It was accompanied by a Type II radio burst beginning at 23/1747 |
| UTC and ejecta to the west was observed in GOES SUVI 304 angstrom |
| imagery. |
| Region 3654 (S08E25, Dai/beta) experienced magnetic flux transport in |
| the leader and decent configuration changes. Region 3646 (N21W20, |
| Dai/beta) spread further in length, but underwent some decay in leader |
| spots. Many other changes were noted with the numerous number of spot |
| groups, but all the aforementioned are the main highlights. There are |
| also a few areas of potential spot development that may warrant |
| designation should they not decay away. |
| Multiple narrow, southward CMEs as well as a larger partial halo CME |
| associated with the M2.9 from AR 3638 were observed. This CME has been |
| analyzed and appears to transit just ahead of Earths orbital location. |
| |
| --- |
| .Forecast... |
| Despite a recent lull in M-class flares, solar activity is still |
| expected to be at moderate to high levels over 24-26 Apr, with M-class |
| flares (R1-R2/Minor-Moderate) expected, and a slight chance for an |
| X-class flare (R3/Strong). |
| --- |
| Energetic Particle |
| --- |
| .24 hr Summary... |
| The greater than 2 MeV electron flux was normal to moderate and the |
| greater than 10 MeV proton flux was at background levels. |
| --- |
| .Forecast... |
| There is a slight chance for the greater than 10 MeV proton flux to |
| reach S1 (Minor) levels over 24-26 Apr due to the flare potential and |
| location of several active regions on the visible disk. The greater than |
| 2 MeV electron flux is expected to continue at normal to moderate levels |
| throughout the forecast period. |
| --- |
| Solar Wind |
| --- |
| .24 hr Summary... |
| Solar wind conditions were indicative of a slow regime. Total IMF |
| strength decreased from 5-6 nT to 2-4 nT and the Bz component underwent |
| mainly weak deviations. Solar wind speed varied primarily between |
| 350-400 km/s and the phi angle was negative until just after 24/0600 |
| UTC, when it deflected into a positive sector. |
| --- |
| .Forecast... |
| Enhanced solar wind conditions are expected 24-26 Apr due to CH HSS |
| influences and possible weak nearby transient passages. |
| --- |
| Geospace |
| --- |
| .24 hr Summary... |
| The geomagnetic field was mostly quiet, with an isolated unsettled |
| period later on 23 Apr. |
| --- |
| .Forecast... |
| Geomagnetic field activity is expected to reach unsettled levels on 24 |
| Apr, due to negative polarity CH HSS influences. Unsettled and active |
| levels are expected on 25 Apr from possible CME activity and the onset |
| of positive polarity CH HSS influences. These conditions are anticipated |
| to persist through 25 Apr. A chance for minor (G1) or greater |
| geomagnetic storms does exist due to the eruptive activity noted above, |
| although there are no obvious Earth-directed events discernible in the |
| coronagraph imagery. |
