Space Weather July 23-29

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)

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

Hit Earth on 26th Caused flux in electron and proton levels Kp reached 4

iSWA magnetosphere simulations

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

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

Halo CME on 26

Started 18:36 Lasted 4 hours Principal Angle: 216 Angular Width: 138 Velocity: 482 (241-762) Variation: 109

Weekend Aurora

NBC Nightly News on July 19

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