Viewing archive of Thursday, 16 July 1998
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 1998 Jul 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 197 Issued at 2200Z on 16 JUL 1998IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z SOLAR ACTIVITY HAS BEEN LOW. NEW REGION 8275 (N16E64)
WAS NUMBERED TODAY. SEVERAL SUNSPOT GROUPS CONTRIBUTE TO THE NEAR
C-CLASS BACKGROUND AND HAVE THE POSSIBILITY TO GENERATE LOW M-CLASS
ACTIVITY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW WITH THE POSSIBILITY OF M-CLASS ACTIVITY FROM REGIONS 8273 AND
8274.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
THE GEOMAGNETIC FIELD RANGED FROM UNSETTLED CONDITIONS TO MINOR STORM
CONDITIONS. THE CAUSE OF THIS ACTIVITY APPEARS TO BE A
GEO-EFFECTIVELY POSITIONED CORONAL HOLE. SOLAR WIND SPEEDS ROSE
FROM 300 KM/S NEAR THE START OF THE UT DAY TO NEARLY 700 KM/S FROM
06-1400 UT.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
QUIET TO UNSETTLED WITH ISOLATED ACTIVE PERIODS.
III. Event Probabilities 17 JUL to 19 JUL
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 16 JUL 106 Predicted 17 JUL-19 JUL 106/107/108 90 Day Mean 16 JUL 107
V. Geomagnetic A Indices
OBSERVED AFR/AP 15 JUL 002/005 ESTIMATED AFR/AP 16 JUL 025/040 PREDICTED AFR/AP 17 JUL-19 JUL 015/018-012/012-010/012
VI. Geomagnetic Activity Probabilities 17 JUL to 19 JUL
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
Latest news
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Latest forum messages
Power transmission for all of us. And why I believe we are better prepared than ever for major solar events 10Strong far side CME 334Incoming & Unnumbered Active Regions 1353Unspecified geomagnetic activity 1750Filaments and prominences 595
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/22 | M1.0 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 103.3 -49.2 |
| Last 30 days | 115.4 -40.8 |