CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19982180644
Observation time: 08/06/1998 218.28067 0644 [UT]

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General information
Asymptotic parameters
Shock front normals
Key parameters
Wave speed and Mach numbers
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Selected
Simple methods
Rankine
Individual equations
Shock speed
Theta Bn
Mach numbers


General Information (About, Top)

Year 1998
Fractional day of year 218.280671
Arrival time of shock [seconds of day] 24250.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.038
Y GSE location of spacecraft [Re] 0.004
Z GSE location of spacecraft [Re] 0.003
Upstream plasma points selected for analysis 0012
Upstream field points selected for analysis 0048
Downstream plasma points selected for analysis 0008
Downstream field points selected for analysis 0036
Minimum chisq/dof for RH8,RH9,RH10 16.98, 33.31, 33.86
Event added to database
Sat Apr 30 21:42:51 2005
Event last processed
Wed Oct 15 14:31:23 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.009 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -370.3 ± 2.6 -417.6 ± 2.4
Vy GSE [km/s] -9.5 ± 1.6 -8.1 ± 1.4
Vz GSE [km/s] -6.3 ± 3.2 9.2 ± 1.6
Wi [km/s] 14.9 ± 1.3 23.6 ± 1.1
We [km/s] 472.3 ± 40.3 746.9 ± 35.8
Ni [n/cc] 12.1 ± 1.0 27.6 ± 1.0
Bx GSE [nT] -0.1 ± 0.2 0.5 ± 0.1
By GSE [nT] 8.9 ± 0.1 14.5 ± 0.5
Bz GSE [nT] -6.5 ± 0.2 -12.1 ± 0.3
Plasma Beta
0.048 ± 0.046
0.093 ± 0.096
Sound Speed [km/s]
19.27 ± 1.66
30.50 ± 1.46
Alfven Speed [km/s]
68.79 ± 3.21
77.76 ± 1.77

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.696 ± 0.409 0.571 ± 0.484 0.434 ± 0.405 25.74 ± 22.61 140.63 ± 38.80
VC -0.951 ± 0.020 0.029 ± 0.044 0.307 ± 0.297 17.90 ± 3.70 178.26 ± 2.64
MX1 -0.956 ± 0.015 0.255 ± 0.050 0.143 ± 0.142 8.24 ± 3.01 165.09 ± 3.02
MX2 -0.961 ± 0.015 0.244 ± 0.051 0.133 ± 0.132 7.65 ± 3.03 165.73 ± 3.06
MX3 -0.966 ± 0.014 0.230 ± 0.054 0.119 ± 0.118 6.82 ± 3.12 166.63 ± 3.18
RH08 -0.993 ± 0.001 0.114 ± 0.010 0.017 ± 0.017 0.96 ± 0.64 173.48 ± 0.58
RH09 -0.986 ± 0.011 0.148 ± 0.067 0.073 ± 0.072 4.16 ± 3.91 171.48 ± 3.86
RH10 -0.986 ± 0.011 0.148 ± 0.067 0.073 ± 0.072 4.16 ± 3.92 171.48 ± 3.87
Average -0.937 0.217 0.162 9.454 166.598
Median -0.961 0.230 0.133 7.652 171.476
Deviation 0.098 0.162 0.139 8.249 11.390

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 77.7 ± 0.7 322.2 ± 0.6 2.28 ± 0.21
VC 81.5 ± 1.2 439.1 ± 0.7 2.28 ± 0.21
MX1 82.4 ± 1.2 435.9 ± 0.7 2.28 ± 0.21
MX2 82.6 ± 1.2 437.6 ± 0.7 2.28 ± 0.21
MX3 82.7 ± 1.3 439.9 ± 0.7 2.28 ± 0.21
RH08 84.7 ± 1.4 451.2 ± 0.7 2.28 ± 0.21
RH09 85.0 ± 1.3 448.7 ± 0.7 2.28 ± 0.21
RH10 85.0 ± 1.3 448.7 ± 6.6 2.28 ± 0.21
Average 82.7 427.9 2.28
Median 82.7 439.9 2.28
Deviation 2.4 43.1 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 72.5 ± 2.6 4.0 ± 0.3 14.7 ± 0.7 71.4 ± 2.9 18.42 ± 1.44 1.02 ± 0.05
VC 89.1 ± 3.1 2.7 ± 0.2 10.1 ± 0.5 71.4 ± 2.9 32.82 ± 2.60 1.25 ± 0.06
MX1 85.1 ± 2.6 2.4 ± 0.2 9.1 ± 0.4 71.4 ± 2.9 34.97 ± 2.67 1.19 ± 0.06
MX2 85.2 ± 2.6 2.4 ± 0.2 8.9 ± 0.4 71.4 ± 2.9 35.60 ± 2.72 1.19 ± 0.06
MX3 85.2 ± 2.6 2.3 ± 0.2 8.7 ± 0.4 71.4 ± 2.9 36.54 ± 2.79 1.19 ± 0.06
RH8 84.5 ± 2.5 1.7 ± 0.1 6.4 ± 0.3 71.4 ± 2.9 49.28 ± 3.77 1.19 ± 0.06
RH9 85.4 ± 2.6 1.6 ± 0.1 6.0 ± 0.3 71.4 ± 2.9 52.77 ± 4.04 1.20 ± 0.06
RH10 85.4 ± 2.6 1.6 ± 0.1 6.0 ± 0.3 71.4 ± 2.9 52.77 ± 4.04 1.20 ± 0.06
Average 84.0 2.4 8.7 71.4 39.1 1.2
Median 85.2 2.4 8.9 71.4 36.5 1.2
Deviation 4.9 0.8 2.9 0.0 11.8 0.1

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 32.1 ± 1.9 6.1 ± 0.2 16.6 ± 0.4 83.3 ± 1.4 5.30 ± 0.36 0.39 ± 0.02
VC 39.4 ± 2.2 4.2 ± 0.2 11.4 ± 0.3 83.4 ± 1.4 9.43 ± 0.66 0.47 ± 0.03
MX1 37.3 ± 2.3 3.7 ± 0.1 10.3 ± 0.2 83.5 ± 1.4 9.97 ± 0.71 0.45 ± 0.03
MX2 37.3 ± 2.3 3.7 ± 0.1 10.1 ± 0.2 83.5 ± 1.4 10.15 ± 0.72 0.45 ± 0.03
MX3 37.3 ± 2.3 3.6 ± 0.1 9.8 ± 0.2 83.5 ± 1.4 10.41 ± 0.75 0.45 ± 0.03
RH8 37.1 ± 2.4 2.6 ± 0.1 7.2 ± 0.2 83.5 ± 1.4 14.08 ± 1.06 0.44 ± 0.03
RH9 37.4 ± 2.4 2.5 ± 0.1 6.8 ± 0.2 83.5 ± 1.4 15.04 ± 1.11 0.45 ± 0.03
RH10 37.4 ± 2.4 2.5 ± 0.1 6.8 ± 0.2 83.5 ± 1.4 15.04 ± 1.11 0.45 ± 0.03
Average 36.9 3.6 9.9 83.5 11.2 0.4
Median 37.3 3.7 10.1 83.5 10.4 0.4
Deviation 2.1 1.2 3.2 0.1 3.4 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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