CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Wind Shock Analysis
Event ID: 19990222021
Observation time: 01/22/1999 22.84845 2021 [UT]

Wind spacecraft

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Asymptotic parameters
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Wave speed and Mach numbers
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Simple methods
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Individual equations
Shock speed
Theta Bn
Mach numbers


General Information (About, Top)

Year 1999
Fractional day of year 22.848455
Arrival time of shock [seconds of day] 73306.5 ± 12.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] -10.572
Y GSE location of spacecraft [Re] -63.408
Z GSE location of spacecraft [Re] 8.026
Upstream plasma points selected for analysis 0007
Upstream field points selected for analysis 0240
Downstream plasma points selected for analysis 0007
Downstream field points selected for analysis 0199
Minimum chisq/dof for RH8,RH9,RH10 5.82, 6.50, 6.77
Event added to database
Mon Feb 14 11:07:34 2005
Event last processed
Mon Mar 30 18:27:25 2009
Method selected
RH08
Propagation delay to Earth [minutes]
1.520 ± 0.572

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -514.7 ± 7.0 -605.1 ± 17.1
Vy GSE [km/s] 32.2 ± 14.5 -13.2 ± 11.8
Vz GSE [km/s] 7.8 ± 12.8 11.9 ± 25.9
Wi [km/s] 60.4 ± 2.4 77.4 ± 11.2
We [km/s] 1910.4 ± 76.9 2447.5 ± 355.3
Ni [n/cc] 2.9 ± 0.1 4.6 ± 0.7
Bx GSE [nT] -7.7 ± 0.6 -6.5 ± 0.9
By GSE [nT] 4.2 ± 1.0 11.2 ± 0.6
Bz GSE [nT] -3.8 ± 1.0 -6.8 ± 2.0
Plasma Beta
0.234 ± 0.228
0.281 ± 0.265
Sound Speed [km/s]
77.99 ± 3.14
99.92 ± 14.51
Alfven Speed [km/s]
125.23 ± 2.69
151.97 ± 14.38

Best values of shock front normal for each method (About, Top)

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.954 ± 0.056 0.105 ± 0.115 -0.281 ± 0.273 -16.31 ± 11.23 173.73 ± 6.88
VC -0.894 ± 0.078 -0.449 ± 0.156 0.017 ± 0.017 0.97 ± 15.28 206.66 ± 9.98
MX1 -0.958 ± 0.048 0.100 ± 0.109 -0.268 ± 0.262 -15.56 ± 9.99 174.04 ± 6.49
MX2 -0.960 ± 0.046 0.096 ± 0.108 -0.262 ± 0.256 -15.22 ± 9.93 174.31 ± 6.41
MX3 -0.963 ± 0.050 0.089 ± 0.112 -0.255 ± 0.250 -14.79 ± 11.09 174.72 ± 6.64
RH08 -0.936 ± 0.007 0.278 ± 0.016 -0.218 ± 0.214 -12.58 ± 1.29 163.45 ± 0.98
RH09 -0.931 ± 0.022 0.276 ± 0.049 -0.240 ± 0.235 -13.90 ± 4.06 163.45 ± 3.00
RH10 -0.933 ± 0.023 0.277 ± 0.057 -0.229 ± 0.225 -13.24 ± 4.07 163.45 ± 3.46
Average -0.941 0.097 -0.217 -12.580 174.228
Median -0.936 0.105 -0.240 -13.900 174.036
Deviation 0.023 0.238 0.097 5.610 14.145

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 23.0 ± 6.1 697.0 ± 170.0 1.60 ± 0.28
VC 59.2 ± 6.0 710.1 ± 252.5 1.60 ± 0.28
MX1 23.5 ± 6.1 701.2 ± 172.3 1.60 ± 0.28
MX2 23.9 ± 6.1 704.0 ± 173.7 1.60 ± 0.28
MX3 24.4 ± 6.0 706.7 ± 175.6 1.60 ± 0.28
RH08 17.1 ± 5.7 668.9 ± 146.5 1.60 ± 0.28
RH09 16.3 ± 5.7 664.8 ± 144.2 1.60 ± 0.28
RH10 16.7 ± 5.7 666.6 ± 145.3 1.60 ± 0.28
Average 25.5 689.9 1.60
Median 23.5 701.2 1.60
Deviation 14.0 19.6 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 204.7 ± 5.8 68.9 ± 2.3 115.3 ± 2.5 130.5 ± 2.1 2.98 ± 0.16 1.57 ± 0.05
VC 264.4 ± 11.8 34.9 ± 0.9 64.2 ± 1.4 143.4 ± 1.6 7.58 ± 0.49 1.84 ± 0.09
MX1 207.0 ± 5.8 68.5 ± 2.3 114.8 ± 2.5 130.7 ± 2.0 3.03 ± 0.16 1.58 ± 0.05
MX2 208.7 ± 5.9 68.2 ± 2.2 114.5 ± 2.5 130.8 ± 2.0 3.06 ± 0.16 1.60 ± 0.05
MX3 210.2 ± 5.9 67.8 ± 2.2 114.0 ± 2.4 131.0 ± 2.0 3.10 ± 0.17 1.60 ± 0.05
RH8 180.2 ± 3.5 72.7 ± 2.6 119.7 ± 2.6 128.4 ± 2.3 2.48 ± 0.11 1.40 ± 0.03
RH9 178.8 ± 3.5 73.1 ± 2.6 120.2 ± 2.6 128.1 ± 2.3 2.45 ± 0.11 1.40 ± 0.03
RH10 179.2 ± 3.5 72.9 ± 2.6 119.9 ± 2.6 128.3 ± 2.3 2.46 ± 0.11 1.40 ± 0.03
Average 204.1 65.9 110.3 131.4 3.4 1.5
Median 207.0 68.9 115.3 130.7 3.0 1.6
Deviation 28.1 12.7 18.8 5.0 1.7 0.2

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 124.4 ± 11.4 86.6 ± 9.9 139.9 ± 13.2 160.5 ± 10.5 1.46 ± 0.27 0.78 ± 0.08
VC 163.3 ± 14.1 43.5 ± 3.8 77.9 ± 7.4 177.5 ± 6.9 3.79 ± 0.51 0.92 ± 0.09
MX1 126.0 ± 11.7 86.1 ± 9.8 139.3 ± 13.2 160.8 ± 10.4 1.49 ± 0.28 0.79 ± 0.08
MX2 127.4 ± 11.8 85.7 ± 9.7 138.9 ± 13.1 161.0 ± 10.3 1.51 ± 0.28 0.79 ± 0.08
MX3 128.3 ± 11.9 85.2 ± 9.6 138.4 ± 13.1 161.2 ± 10.2 1.53 ± 0.28 0.80 ± 0.08
RH8 109.1 ± 13.5 91.8 ± 11.3 145.2 ± 13.7 157.4 ± 11.6 1.21 ± 0.27 0.69 ± 0.08
RH9 108.2 ± 13.0 92.5 ± 11.5 145.9 ± 13.8 157.0 ± 11.7 1.20 ± 0.26 0.69 ± 0.08
RH10 108.4 ± 13.2 92.1 ± 11.4 145.5 ± 13.8 157.2 ± 11.7 1.20 ± 0.27 0.69 ± 0.08
Average 124.4 82.9 133.9 161.6 1.7 0.8
Median 126.0 86.6 139.9 160.8 1.5 0.8
Deviation 18.1 16.2 22.8 6.7 0.9 0.1

Survey interval (About, Top)
Survey of solar wind interval
Selected data (About, Top)
Key plasma parameters
Survey
Velocity
V

Magnetic Field
B


Simple Methods (About, Top)
Simple methods
Rankine Chi^2 Contour (About, Top)

Chisq


Shock Speed (About, Top)
Shock Speed

Theta Bn (About, Top)
Theta Bn

Mach Numbers (About, Top)

Upstream wave speeds
Upstream Mach numbers
Downsteam wave speeds
Downstream mach numbers
Page updated Mon Apr 13 08:55:21 2009
Michael L Stevens (mstevens@cfa.harvard.edu)

   
 

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