Space weather report created summer 2013 by Emily Schomp, summer intern at Harvard Smithsonian CfA

1. Space Weather
July 23-29

2. Weekly Solar Wind
iSWA ACE Data
Latitude (black)
Longitude (blue)
Mag Field (nT)
Bx (black) By (blue) Bz (red)
Bt
Bulk Proton Flow (km/s)
Proton Density (cm-3)
Temperature (K)

3. CME July 22
Cause of Solar Wind Turbulence?
932 km/s (762-1157 km/s)
Variation of Velocity: 109
Start: 6:12
Duration: 3 hrs
Principal Angle: 291o
Angular Width: 284o
Mostly directed At Stereo A

4. Hit Earth on 26th
Caused flux in electron and proton levels
Kp reached 4
iSWA magnetosphere simulations

5. C Flares from 1800
Potential
Cause of Halo
CME
1793-2:37
1800-5:35, 5:36,
12:12, 12:28, 16:
1805-15:58
18:13
21:34
12:28,
18:18,
22:18
Data not
recorded on
solar monitor

6. Three Radio Bursts 245 MHz
• 25th at 8:50-8:51, peak flux 530
• 26th at 6:32, peak flux 100
• 28 at 4:35, peak flux 190
• radio fluxes measured in Jansky (Jy)
o 1 Jy = 10-25 W/m2 . Hz = 10-23 erg/s . cm2 . Hz
• Affected
o AM in Montreal Canada, Schoenewalde and Heidelberg Germany, and Netherlands
o Air Safety Communications in Nordholz ETMN Germany
o military communications satellites Skynet 5A, 5B and 5C
o GCI Alaskan Wireless Network
o Airnorth CAOC 2/Common (used for NATO communications)
o FLTSATCOM (satellite communication system of the U.S. Navy)
o Air Operations Control Station in Nieuw-Milligen, Netherlands

7. Halo CME on 26
Started 18:36
Lasted 4 hours
Principal Angle: 216
Angular Width: 138
Velocity: 482 (241-762)
Variation: 109

8. Weekend Aurora
NBC Nightly News on July 19

9. Current Forecast
• Arrival: Aug 1-2
• Density: 5.5 to 7.5 cm-3
• Temperature: 35,000 to 50,000 K
• Velocity
o Radial: 440 to 520 km/s
o Latitude: 4 to -4 km/s
o Longitude: 3 to -2 km/s
• Magnetic Field Strength
o Radial: -2.2 to -3 nT
o Latitude: 2.0 to 2.6 nT
o Longitude*: 0.015 to -0.005
• Kp: 3
iSWA Forecast Page