Viewing archive of Thursday, 31 October 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Oct 31 1230 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
31 Oct 2019	070	012
01 Nov 2019	070	007
02 Nov 2019	070	007

Bulletin

No active regions visible on the disk. Solar activity has been very low, no flares in the past 24 h. Low solar activity expected.

No Earth directed CMEs in past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 410 km/s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions reached active levels overnight for one time period, both locally with k = 4 at 22:00 UT and planetary with Kp=4 at 00:00 UT. The solar wind measured by ACE shows signs of a possible interaction between the CME from October 25 and the compression region ahead of the high speed stream from a negative polarity coronal hole. The interplanetary magnetic field reached 17 nT with weak southward components, the solar wind speed reached 450 km/s. The coronal hole is composed of small patches which can still affect the Earth in the coming days. Geomagnetic activity is expected to be quiet to unsettled (with possible active periods).

Today's estimated international sunspot number (ISN): 000, based on 17 stations.

Solar indices for 30 Oct 2019

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	019
AK Wingst	///
Estimated Ap	010
Estimated international sunspot number	000 - Based on 22 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

All times in UTC

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