Geophysical report

Viewing archive of Tuesday, 23 February 1999

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.

Solar and Geophysical Activity Summary 1999 Feb 23 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 054 Issued at 0245Z on 23 FEB 1999 This report is compiled from data received at SWO on 22 FEB

A. Energetic Events

Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
None

B. Proton Events

None

C. Geomagnetic Activity Summary

THE GEOMAGNETIC FIELD WAS QUIET.

D. Stratwarm

STRATWARM ALERT/MONDAY/STRATWARM EXISTS. AN INTENSE LARGE WARM REGION CONTINUES OVER SIBERIA, ALASKA, WESTERN CANADA, AND THE SIBERIAN/CANADIAN ARCTIC. WARM AIR IS SPREADING NORTH AND NORTHEASTWARDS.

E. Daily Indices: (real-time preliminary/estimated values)

10 CM 130  SSN 108  AFR/AP 007/004   X-RAY BACKGROUND B4.6
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 6.2E+05   GT 10 MEV 1.6E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 1.00E+08 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 2 2 2 1 2 1 2 2 PLANETARY 2 1 2 1 2 0 0 2

F. Comments

  THE GREATER THAN 2 MEV ELECTRON FLUENCE WAS MODERATE.

All times in UTC

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G2 - Moderate geomagnetic storm

Observed Kp: 6
Threshold reached: 22:29 UTC

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Reykjavik

The solar wind speed is currently moderately high (604.8 km/sec.)

The strength of the interplanetary magnetic field is high (22.51nT), the direction is North (12.23nT).

The Disturbance Storm Time index predicts moderate storm conditions right now (-60nT)

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