SolarHam.com - Older News Archive (July 2017)

July 16, 2017 @ 22:00 UTC
CME Impact / Storm Warning (UPDATED)
A shock passage, likely related to the CME observed a few days ago has swept past Earth. A geomagnetic sudden impulse was detected at 06:01 UTC (Jul 16) marking the exact moment of impact. The solar wind speed is currently near 430 km/s and the BZ component of the interplanetary magnetic field (IMF) is currently pointing sharply south (-20nT). Minor (G1) geomagnetic storming will be possible in the hours ahead with a chance for moderate (G2) storming as well.

UPDATE: Periods of minor (G1) to moderate (G2) storming continues on Sunday evening in the wake of a CME impact. Sky watchers at higher latitudes should be alert for visible aurora once dark outisde.

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1365
Valid From: 2017 Jul 16 0520 UTC
Now Valid Until: 2017 Jul 17 0600 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2017 Jul 16 0601 UTC
Deviation: 40 nT
Station: HAD

July 16, 2017 @ 00:40 UTC
Moderate (G2) Storm Watch / Aurora Watch
A moderate (G2) geomagnetic storm watch will be in effect for the next 24-48 hours. A coronal mass ejection (CME) observed on July 14 is expected to reach Earth on Sunday. Visible aurora will be possible at middle to high latitudes once the plasma cloud reaches our planet. Sky watchers should be alert if local light and weather conditions allow!

July 14, 2017 @ 09:30 UTC
Long Duration M-Flare / CME / G2 Storm Watch (UPDATED)
Finally a noteworthy event to report. A long duration M2.4 solar flare was observed around region 2665 in the southwest quadrant beginning at 01:05 UTC (July 14th). The flare was associated with a 10cm Radio Burst (TenFlare) lasting 44 minutes and measuring 130 solar flux units (SFU). A Type IV radio emission was also logged at 02:02 UTC. Updated imagery by SDO suggests a coronal mass ejection (CME) is associated. More updates to follow.

Moderate Storm Watch Added: A moderate G2 geomagnetic storm watch will be in effect beginning July 16th. The CME produced by the flare is expected to impact our geomagnetic field and could lead to nice aurora at higher latitudes.

UPDATE #2: Earth facing coronagraph imagery is now available. A bright coronal mass ejection (CME) was produced, but was directed mostly to the west. There does still however appear to be an Earth directed component that could reach our planet within 72 hours. This could lead to a geomagnetic enhancement at higher latitudes. It should also be noted that a minor (S1) radiation storm is now in progress as fast moving particles propelled into space by the flare are now moving past our planet. More updates later today regarding an approximate arrival time. Click HERE for a short video of the CME.

UPDATE: The STEREO Ahead spacecraft confirms that a halo CME is associated with this event and could have an Earth directed component. More to follow.

Halo Coronal Mass Ejection (CME) - STEREO Ahead

July 14, 2017 @ 00:40 UTC
Solar Update / C8 Flare
Good evening. Attached image below captures a C8.4 solar flare at 20:05 UTC (Jul 13) around a new sunspot region forming towards the west limb. This region also produced a few other lower level C-Flares as well within the past 4 hours. Elsewhere, regions 2665 and new sunspot group 2666 are both relatively stable. More updates will be provided if any interesting solar events are detected. Image by SDO/AIA.

July 12, 2017 @ 00:45 UTC
Region 2665 Update
Big sunspot 2665 initially looked promising, but is now beginning to lose magnetic complexity is rotates across the visible disk. Only low level C-Flares were detected on Tuesday. Minor C-Flares will remain possible during the next 24 hours with a smaller threat for an isolated M-Flare.

July 10, 2017 @ 00:45 UTC
Big Sunspot a Flare Threat
Large sunspot 2665 continues to evolve in the southeast quadrant and has produced a number of minor C-Flares and one low level M-Flare so far. The active region has a beta-gamma magnetic configuration and could produce additional moderate M-Flares during the next 24 hours. An eruptive flare at this point could be Earth directed as the rotation now has the sunspot almost directly facing our planet. Stay tuned to SolarHam.com for the latest information.

July 7, 2017 @ 01:00 UTC
Geomagnetic Storm Watch / Solar Update
A high speed solar wind stream flowing from a geoeffective coronal hole is now beginning to move past Earth. A minor (G1) geomagnetic storm watch will be in effect for the next 24 hours.

In other news, sunspot 2665 continues to grow in the southeast quadrant and is producing B-Flares and occasional C-Flares. The region will continue to be monitored as it turns towards our planet.

July 7, 2017 @ 00:55 UTC
Sunspot 2665 Update
Good evening. Solar flare activity remains at very low levels, although sunspot 2665 in the southeast quadrant could soon produce occasional C-Flares. The region is currently showing spot development and will be monitored. Image below by SDO/HMI.

July 6, 2017 @ 00:50 UTC
New Sunspot / Coronal Hole
A new sunspot is turning into view off the southeast limb and was assigned number 2665. So far it appears to be stable and the chances for noteworthy solar flares will remain low. Image below by SDO/HMI.

A middle latitude coronal hole will become geoeffective by late this weekend. A high speed solar wind stream flowing from this zone could lead to minor (G1) geomagnetic storming at higher latitudes. More updates in the days ahead.

July 2, 2017 @ 12:00 UTC
Minor Storming Observed
A weak shock passage was detected on Saturday and this led to a period of minor (G1) storming at higher latitudes early Sunday morning. Isolated periods of enhanced activity will be possible during the next 24 hours.

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Jul 02 0859 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor