CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19981641855
Observation time: 06/13/1998 164.78869 1855 [UT]

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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 164.788692
Arrival time of shock [seconds of day] 68143.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.035
Y GSE location of spacecraft [Re] 0.003
Z GSE location of spacecraft [Re] -0.003
Upstream plasma points selected for analysis 0010
Upstream field points selected for analysis 0042
Downstream plasma points selected for analysis 0009
Downstream field points selected for analysis 0038
Minimum chisq/dof for RH8,RH9,RH10 13.61, 16.39, 16.75
Event added to database
Sat Apr 30 21:42:35 2005
Event last processed
Wed Oct 15 14:23:05 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] -307.5 ± 5.7 -377.4 ± 5.4
Vy GSE [km/s] -6.2 ± 2.2 27.6 ± 2.1
Vz GSE [km/s] 4.4 ± 5.6 -44.2 ± 4.5
Wi [km/s] 19.7 ± 3.4 31.7 ± 5.7
We [km/s] 622.1 ± 107.5 1003.9 ± 181.8
Ni [n/cc] 3.9 ± 0.7 17.2 ± 2.5
Bx GSE [nT] -0.9 ± 0.4 1.0 ± 1.3
By GSE [nT] 3.7 ± 0.1 6.8 ± 0.6
Bz GSE [nT] 1.1 ± 0.5 6.8 ± 0.3
Plasma Beta
0.204 ± 0.167
0.392 ± 0.303
Sound Speed [km/s]
24.94 ± 4.41
40.98 ± 7.42
Alfven Speed [km/s]
45.46 ± 4.97
51.88 ± 3.48

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.457 ± 0.157 0.850 ± 0.087 -0.263 ± 0.257 -15.28 ± 5.27 118.28 ± 10.57
VC -0.762 ± 0.042 0.371 ± 0.049 -0.531 ± 0.474 -32.07 ± 4.34 154.02 ± 3.41
MX1 -0.622 ± 0.059 0.755 ± 0.050 -0.207 ± 0.204 -11.96 ± 3.83 129.48 ± 4.46
MX2 -0.685 ± 0.070 0.707 ± 0.068 -0.175 ± 0.173 -10.07 ± 3.94 134.11 ± 5.61
MX3 -0.717 ± 0.084 0.680 ± 0.089 -0.156 ± 0.154 -8.96 ± 4.24 136.53 ± 7.09
RH08 -0.947 ± 0.004 0.318 ± 0.012 0.039 ± 0.039 2.24 ± 0.68 161.45 ± 0.71
RH09 -0.942 ± 0.023 0.335 ± 0.064 0.017 ± 0.017 0.96 ± 4.05 160.45 ± 3.91
RH10 -0.948 ± 0.022 0.318 ± 0.065 0.028 ± 0.028 1.60 ± 4.06 161.45 ± 3.91
Average -0.760 0.542 -0.156 -9.191 144.471
Median -0.717 0.680 -0.156 -8.958 154.017
Deviation 0.178 0.226 0.192 11.458 16.920

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 35.5 ± 7.8 229.1 ± 7.1 4.55 ± 0.67
VC 69.4 ± 7.2 348.8 ± 9.7 4.55 ± 0.67
MX1 39.3 ± 7.1 288.6 ± 8.1 4.55 ± 0.67
MX2 41.4 ± 6.7 309.7 ± 8.4 4.55 ± 0.67
MX3 42.6 ± 6.5 320.1 ± 8.5 4.55 ± 0.67
RH08 60.2 ± 4.5 386.9 ± 9.3 4.55 ± 0.67
RH09 59.6 ± 4.6 387.0 ± 9.3 4.55 ± 0.67
RH10 60.4 ± 4.5 387.8 ± 9.3 4.55 ± 0.67
Average 51.1 332.2 4.55
Median 59.6 348.8 4.55
Deviation 12.7 56.8 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 95.2 ± 2.0 18.9 ± 2.6 37.0 ± 4.0 48.5 ± 3.5 5.15 ± 0.82 1.97 ± 0.14
VC 119.3 ± 5.6 7.7 ± 0.9 16.0 ± 1.8 51.6 ± 2.9 15.82 ± 2.39 2.32 ± 0.14
MX1 103.0 ± 2.8 17.7 ± 2.4 35.2 ± 3.8 49.0 ± 3.4 5.91 ± 0.93 2.11 ± 0.15
MX2 104.1 ± 3.2 17.1 ± 2.3 34.1 ± 3.7 49.2 ± 3.4 6.19 ± 0.97 2.12 ± 0.14
MX3 104.5 ± 3.4 16.7 ± 2.2 33.4 ± 3.7 49.3 ± 3.3 6.35 ± 0.99 2.13 ± 0.14
RH8 97.1 ± 4.9 10.9 ± 1.3 22.6 ± 2.5 51.0 ± 3.0 9.01 ± 1.36 1.91 ± 0.13
RH9 99.0 ± 4.9 11.1 ± 1.3 23.0 ± 2.5 50.9 ± 3.0 9.02 ± 1.36 1.95 ± 0.13
RH10 97.9 ± 4.9 10.9 ± 1.3 22.5 ± 2.5 51.0 ± 3.0 9.14 ± 1.38 1.93 ± 0.13
Average 102.5 13.9 28.0 50.1 8.3 2.1
Median 103.0 16.7 33.4 50.9 9.0 2.1
Deviation 7.6 4.2 7.8 1.2 3.4 0.1

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 21.7 ± 3.4 28.7 ± 3.6 42.2 ± 2.8 59.8 ± 4.2 0.77 ± 0.17 0.36 ± 0.07
VC 27.6 ± 4.0 11.4 ± 1.3 18.3 ± 1.2 65.4 ± 5.1 2.47 ± 0.55 0.43 ± 0.08
MX1 24.0 ± 4.2 26.9 ± 3.3 40.1 ± 2.7 60.7 ± 4.4 0.91 ± 0.21 0.40 ± 0.08
MX2 23.9 ± 4.4 25.9 ± 3.1 38.9 ± 2.6 61.1 ± 4.5 0.94 ± 0.23 0.39 ± 0.08
MX3 24.0 ± 4.6 25.3 ± 3.1 38.2 ± 2.6 61.4 ± 4.5 0.96 ± 0.24 0.39 ± 0.08
RH8 22.4 ± 5.7 16.3 ± 1.9 25.8 ± 1.7 64.3 ± 5.0 1.40 ± 0.42 0.35 ± 0.10
RH9 23.0 ± 5.6 16.6 ± 1.9 26.2 ± 1.8 64.3 ± 5.0 1.41 ± 0.41 0.36 ± 0.10
RH10 22.7 ± 5.6 16.2 ± 1.9 25.7 ± 1.7 64.4 ± 5.0 1.42 ± 0.42 0.36 ± 0.10
Average 23.7 20.9 31.9 62.7 1.3 0.4
Median 23.9 25.3 38.2 64.3 1.4 0.4
Deviation 1.8 6.5 8.9 2.1 0.5 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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