Viewing archive of Saturday, 4 May 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 May 04 1231 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
04 May 2019	070	010
05 May 2019	072	006
06 May 2019	074	009

Bulletin

As expected, solar flaring activity is increasing, as NOAA AR 2740 has rotated on the visible side of the solar disc. This active region was the source of the B3.9 and C1.0 flare (peaked at 23:32 UT on May 03). In the coming hours we expect B-class and also C-class flares, in particular since one more active region will start to rotate to the visible side of the solar disc. The CMEs associated with the reported flares were rather narrow and slow, and they are not expected to arrive to the Earth. The solar protons are at the background level. The solar wind speed is presently about 480 km/s and the interplanetary magnetic field magnitude is 5 nT. The fast solar wind associated with the small equatorial coronal hole of negative polarity, which reached central meridian yesterday morning, is expected to arrive at the Earth on May 6. The geomagnetic conditions are presently quiet to unsettled and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 012, based on 18 stations.

Solar indices for 03 May 2019

Wolf number Catania	///
10cm solar flux	///
AK Chambon La Forêt	///
AK Wingst	///
Estimated Ap	///
Estimated international sunspot number	000 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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