CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19983120421
Observation time: 11/08/1998 312.18146 0421 [UT]

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Asymptotic parameters
Shock front normals
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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 1998
Fractional day of year 312.181458
Arrival time of shock [seconds of day] 15678.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.035
Y GSE location of spacecraft [Re] -0.004
Z GSE location of spacecraft [Re] -0.003
Upstream plasma points selected for analysis 0009
Upstream field points selected for analysis 0037
Downstream plasma points selected for analysis 0011
Downstream field points selected for analysis 0044
Minimum chisq/dof for RH8,RH9,RH10 13.82, 18.43, 19.34
Event added to database
Sat Apr 30 21:43:26 2005
Event last processed
Wed Oct 15 14:43:33 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.005 ± 0.001

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -457.8 ± 12.8 -602.4 ± 9.3
Vy GSE [km/s] 10.0 ± 4.9 29.6 ± 10.3
Vz GSE [km/s] 5.5 ± 11.0 -27.3 ± 14.6
Wi [km/s] 27.0 ± 5.1 56.9 ± 4.4
We [km/s] 854.2 ± 161.9 1798.0 ± 140.0
Ni [n/cc] 5.3 ± 0.6 11.8 ± 2.4
Bx GSE [nT] -2.4 ± 1.9 8.6 ± 1.2
By GSE [nT] 16.0 ± 0.4 28.1 ± 1.4
Bz GSE [nT] -5.7 ± 1.1 -15.6 ± 2.4
Plasma Beta
0.025 ± 0.026
0.073 ± 0.076
Sound Speed [km/s]
32.91 ± 3.35
73.33 ± 5.65
Alfven Speed [km/s]
162.84 ± 10.79
212.27 ± 22.86

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.721 ± 0.090 0.693 ± 0.094 0.005 ± 0.005 0.29 ± 8.11 136.15 ± 7.47
VC -0.966 ± 0.028 0.132 ± 0.073 -0.221 ± 0.217 -12.74 ± 6.78 172.21 ± 4.34
MX1 -0.812 ± 0.054 0.496 ± 0.083 -0.307 ± 0.297 -17.89 ± 4.81 148.59 ± 5.75
MX2 -0.816 ± 0.048 0.437 ± 0.068 -0.378 ± 0.359 -22.24 ± 5.50 151.85 ± 4.63
MX3 -0.814 ± 0.051 0.388 ± 0.063 -0.431 ± 0.402 -25.53 ± 6.32 154.50 ± 4.15
RH08 -0.783 ± 0.007 0.358 ± 0.007 -0.508 ± 0.459 -30.56 ± 0.71 155.43 ± 0.50
RH09 -0.777 ± 0.044 0.355 ± 0.064 -0.520 ± 0.467 -31.30 ± 4.01 155.43 ± 4.57
RH10 -0.783 ± 0.044 0.358 ± 0.065 -0.508 ± 0.459 -30.56 ± 4.01 155.43 ± 4.67
Average -0.809 0.402 -0.359 -21.315 153.700
Median -0.783 0.388 -0.378 -22.237 155.432
Deviation 0.071 0.157 0.181 10.962 9.926

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 41.1 ± 7.2 552.6 ± 57.2 2.26 ± 0.65
VC 70.2 ± 5.9 716.3 ± 64.6 2.26 ± 0.65
MX1 46.9 ± 5.9 629.9 ± 60.7 2.26 ± 0.65
MX2 49.4 ± 5.4 632.8 ± 60.5 2.26 ± 0.65
MX3 51.5 ± 5.1 632.5 ± 60.1 2.26 ± 0.65
RH08 52.2 ± 4.5 611.6 ± 58.4 2.26 ± 0.65
RH09 52.2 ± 4.4 608.1 ± 58.1 2.26 ± 0.65
RH10 52.2 ± 4.5 611.6 ± 58.4 2.26 ± 0.65
Average 52.0 624.4 2.26
Median 52.2 629.9 2.26
Deviation 8.3 45.3 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 214.9 ± 8.6 24.6 ± 2.5 122.7 ± 8.1 164.3 ± 10.7 8.82 ± 0.93 1.31 ± 0.10
VC 272.5 ± 10.2 11.0 ± 1.1 55.2 ± 3.7 165.8 ± 10.5 25.09 ± 2.58 1.65 ± 0.13
MX1 254.3 ± 8.1 22.2 ± 2.2 111.2 ± 7.4 164.7 ± 10.6 11.56 ± 1.27 1.55 ± 0.12
MX2 256.4 ± 7.9 21.1 ± 2.1 105.9 ± 7.0 164.8 ± 10.6 12.24 ± 1.36 1.56 ± 0.12
MX3 257.7 ± 7.7 20.2 ± 2.0 101.3 ± 6.7 164.9 ± 10.6 12.88 ± 1.44 1.57 ± 0.12
RH8 251.9 ± 7.3 19.9 ± 2.0 99.9 ± 6.6 165.0 ± 10.6 12.77 ± 1.46 1.53 ± 0.12
RH9 251.4 ± 7.3 19.9 ± 2.0 99.9 ± 6.6 165.0 ± 10.6 12.74 ± 1.46 1.53 ± 0.12
RH10 251.9 ± 7.3 19.9 ± 2.0 99.9 ± 6.6 165.0 ± 10.6 12.77 ± 1.46 1.53 ± 0.12
Average 251.4 19.9 99.5 164.9 13.6 1.5
Median 254.3 20.2 101.3 165.0 12.8 1.6
Deviation 16.2 3.9 19.6 0.4 4.8 0.1

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 97.9 ± 10.3 53.8 ± 4.2 160.0 ± 17.2 218.1 ± 22.9 1.83 ± 0.21 0.45 ± 0.07
VC 124.3 ± 10.2 23.6 ± 1.8 71.9 ± 7.7 223.4 ± 23.0 5.28 ± 0.40 0.56 ± 0.06
MX1 117.8 ± 10.1 48.4 ± 3.7 144.9 ± 15.6 219.3 ± 22.9 2.44 ± 0.18 0.54 ± 0.06
MX2 118.2 ± 10.4 46.0 ± 3.6 138.1 ± 14.9 219.8 ± 22.9 2.57 ± 0.19 0.54 ± 0.06
MX3 118.9 ± 10.7 43.9 ± 3.4 132.0 ± 14.2 220.3 ± 22.9 2.71 ± 0.19 0.54 ± 0.05
RH8 115.6 ± 11.1 43.3 ± 3.4 130.2 ± 14.0 220.4 ± 22.9 2.67 ± 0.19 0.53 ± 0.05
RH9 115.6 ± 11.2 43.3 ± 3.4 130.2 ± 14.0 220.4 ± 22.9 2.67 ± 0.19 0.53 ± 0.05
RH10 115.6 ± 11.1 43.3 ± 3.4 130.2 ± 14.0 220.4 ± 22.9 2.67 ± 0.19 0.53 ± 0.05
Average 115.5 43.2 129.7 220.3 2.9 0.5
Median 117.8 43.9 132.0 220.4 2.7 0.5
Deviation 7.7 8.7 25.5 1.5 1.0 0.0

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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