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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 3h

Next 24hrs-QUIET. Solar wind parameters are down at background levels today, so geomagnetic activity is expected to remain QUIET. A CME that left the Sun yesterday is expected to arrive early on 9th Oct, which will probably increase geomagnetic acitvity in tomorrow's forecast.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 06/10/2026

Next 24hrs-QUIET. Coronal hole effects are starting to wane now. We may still get some brief ACTIVE periods, but conditions are expected to remain mostly QUIET. A CME that left the Sun this morning might wake things up in a couple of days...

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 05/10/2026

Next 24 hours - QUIET. Coronal hole effects have been disturbing the geomagnetic field over the weekend, cauing some ACTIVE and STORM periods. Further ACTIVE periods are likely over the next 24 hours, with a slight chance for some brief STORM intervals.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 02/10/2026

Next 72 hours- QUIET to STORM. Possible CME glance at first followed by effects from of a large re-current coronal hole. Fast solar wind stream expected late tomorrow or early Sunday (UT day), hence there's a chance of some ACTIVE to STORM periods before the end of the weekend.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 30/09/2026

Next 24hrs - QUIET. Solar wind remains at background levels. A C8.6-class solar flare and associated CME has been observed on 30-SEP. Early modelling seems to indicate that it will pass ahead of Earth's orbit.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 29/09/2026

Next 24 hours – QUIET. A CME has been observed from a large filament eruption on 28-SEP and is expected to arrive later in the week until then expect QUIET conditions before the STORM.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 28/09/2026

Next 24hrs - QUIET conditions are expected for the next few days following the resent passage of the CH high-speed stream at the end of last week.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 25/09/2026

Next 72hrs - ACTIVE. Solar wind speed is currently slightly elevated due to CH effects and a second high-speed stream from a northern CH is expected to arrive 26-Sep. ACTIVE spells are likely to persist over the next two days and there is a small chance of brief, isolated minor STORM intervals.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 24/09/2026

Next 24hrs - QUIET to STORM. Solar wind parameters are now starting to increase due to a positive polarity coronal hole. Should wind speed continue to rise there are likely to be some STORM G1 spells later today.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 23/09/2026

Next 24hrs - QUIET to STORM G1. Fast solar wind from a recurrent coronal hole is expected to arrive later today bringing some potential STORM intervals.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 22/09/2026

Next 24hrs - QUIET conditions are expected to persist as solar wind parameters remain at background levels.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 21/09/2026

Next 24hrs - QUIET. Solar wind speeds are at background levels with no significant enhancements expected.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 18/09/2026

Next 72hrs - QUIET. Coronal hole influence is gradually waning leading to ambient solar wind conditions.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 17/09/2026

Next 24hrs - QUIET. Coronal hole influence is expected to continue through the day before gradually waning into tomorrow. Outside chance of some ACTIVE geomagnetic spells.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 16/09/2026

Next 24hrs - QUIET. Solar wind speeds have been enhanced to slightly elevated levels due to coronal hole influence. Glancing CME effects may increase geomagnetic activity briefly to ACTIVE or STORM levels.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 15/09/2026

Next 24hrs - QUIET. Coronal hole influence should elevate solar winds. A glancing blow from a CME may occur later in the day which may results in some isolated STORM geomagnetic conditions.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 14/09/2026

Next 24hrs - QUIET. Solar wind speeds are expected to become enhanced later due to coronal hole influence. This will likely cause some ACTIVE to STORM G1 spells of geomagnetic activity.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 11/09/2026

Next 72hrs - QUIET to STORM. A high-speed stream from a small coronal hole is expected to arrive today, potentially bringing some minor STORM spells. Conditions are then expected to reduce down to QUIET towards the end of the weekend.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 10/09/2026

Next 24hrs - QUIET. Solar wind speed remains at ~450km/s due to residual CME influence. Some ACTIVE spells are possible whilst these conditions persist.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 09/09/2026

Next 24hrs - QUIET. There has been limited enhancement in geomagnetic activity associated with the three CMEs from the 5th and 6th September. Solar wind speed is still slightly elevated so some ACTIVE to STORM spells are possible as the residual CME effects wane.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 08/09/2026

Next 24hrs - ACTIVE to STORM. Activity has increased over the past 24hrs due to a coronal hole and further STORM conditions are likely due to the anticipated arrival of up to three CMEs. Upon impact we may see up to STORM G2 intervals.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 07/09/2026

Next 24hrs - QUIET. Solar wind parameters are currently increasing associated with a small coronal hole bringing chances of ACTIVE to STORM G1 intervals. Up to three CMEs observed on the 5th and 6th will potentially arrive in the coming days.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 04/09/2026

Next 72hrs - QUIET initially but a Coronal Hole High Speed Stream could arrive late on Sunday or into Monday bringing some ACTIVE periods.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 03/09/2026

Next 24hrs - Continues to be QUIET. No change.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 02/09/2026

Next 24hrs - Still looking QUIET for the next few days.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 01/09/2026

Next 24hrs - QUIET for the next few days.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 28/08/2026

Next 72hrs - ACTIVE. No coronal hole effects were observed yesterday but the solar wind speed is now starting to gradually increase. A glancing blow from two CMEs launched on the 25th Aug may arrive during the 28-29th. The combined effects could give ACTIVE to STORM periods.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 27/08/2026

Next 24hrs - ACTIVE. We await the arrival of a high-speed solar wind stream from a coronal hole. So far geomagnetic conditions are quiet, but geomagnetic activity could reach ACTIVE to STORM levels once the fast solar wind arrives.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 26/08/2026

Next 24hrs - QUIET (mainly). Quiet geomagnetic conditions are expected until the onset of a high-speed solar wind stream from a coronal hole which is expected to arrive during the 27th Aug. ACTIVE/STORM periods following this arrival.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 25/08/2026

Next 24hrs - QUIET. Some minor M-class flare were produced from active region 14513 over the past 24hrs. This region is in an Earth-facing position, however no Earth-directed CMEs have been observed.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 24/08/2026

Next 24hrs - QUIET. The solar wind returned toward background levels over the weekend. Solar activity is low and quiet geomagnetic conditions are anticipated.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 21/08/2026

Next 72hrs - QUIET. Solar wind speed is elevated due to CH effects but expected to gradually decline over the weekend. There remains a chance of some ACTIVE spells over the next 24 hours before conditions return to QUIET.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 20/08/2026

Next 24hrs - ACTIVE. Further enhancement in the already elevated solar wind speed is anticipated today due to the arrival of high-speed stream from a second CH and a possible glancing blow of a CME from 16-Aug. The combined impact of these could cause isolated STORM spells.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 19/08/2026

Next 24hrs - ACTIVE to STORM. The early onset of a high-speed stream from a CH has enhanced activity sooner than expected. This and the anticipated arrival of a second CH high-speed stream means similar conditions should persist, with chances of further STORM G1 spells.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 18/08/2026

Next 24hrs - ACTIVE. Solar wind speed is slightly above background levels following the arrival of the CME from 14-Aug. Further ACTIVE spells are expected as the effects of the CME wane.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 17/08/2026

Next 24hrs - ACTIVE to STORM. A CME associated with a filament eruption observed on 14-Aug is expected to arrive today. Geomagnetic activity levels up to STORM G2 are possible.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 14/08/2026

Next 72hrs-ACTIVE to STORM. Geomagnetic conditions are expected to become elevated today due to the anticipated arrival of a high-speed CH wind stream. Two CMEs were observed leaving the Sun this morning. Although imagery and data are limited, these could arrive late Sunday or early Monday morning.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 13/08/2026

Next 24hrs - QUIET. Solar wind parameters are gradually returning to ambient levels in the wake of a weak CME passage. No significant enhancement in geomagnetic activity is expected today.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 12/08/2026

Next 24 hrs – QUIET to ACTIVE. The CME from the filament eruption on 8-AUG arrived late UT morning on 11-AUG. There was no significant increase in geomagnetic activity following impact. Further isolated ACTIVE spell is possible as CME effects wane.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 10/08/2026

Next 24 hrs – QUIET. Geomagnetic conditions are expected to remain QUIET throughout. There is a low chance that a CME could arrive towards the very end of the forecast period. Should this occur, isolated ACTIVE to STORM G1 intervals would be possible.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 07/08/2026

Next 72hrs - QUIET. Overall low activity is expected, although glancing impacts from CMEs observed on 3-4 Aug may bring some ACTIVE and brief STORM periods over the weekend.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 06/08/2026

Next 24hrs - QUIET. Solar wind remains at ambient levels and no major enhancements in geomagnetic activity are expected.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 05/08/2026

Next 24hrs - QUIET. Solar winds have now returned to background levels and overall low geomagnetic activity is anticipated.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 04/08/2026

Next 24hrs - QUIET. Effects of the recent CME passing are beginning to subside, although chances of brief ACTIVE intervals can be still anticipated today.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 03/08/2026

Next 24hrs - QUIET. Overall low geomagnetic activity is anticipated, with chances of further STORM periods due to the ongoing CME passing.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 31/07/2026

Next 72 hrs - QUIET to ACTIVE. Geomagnetic activity is expected to remain QUIET until Sunday, when the expected arrival of a CME may increase it to ACTIVE. Isolated STORM G1 conditions are possible.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 30/07/2026

Next 24 hrs - QUIET. Geomagnetic activity is expected to remain QUIET as background solar wind conditions persist.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 29/07/2026

Next 24 hrs - QUIET. Geomagnetic activity is expected to remain predominantly QUIET, with a low chance of isolated ACTIVE intervals.

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BGS Geomagnetism @bgsgeomagnetism.bsky.social · 28/07/2026

Next 24 hrs - QUIET. Geomagnetic activity is expected to remain QUIET, with solar wind speeds staying at background levels.

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