CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19981280921
Observation time: 05/08/1998 128.38986 0921 [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 128.389861
Arrival time of shock [seconds of day] 33684.0 ± 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 0010
Upstream field points selected for analysis 0037
Downstream plasma points selected for analysis 0009
Downstream field points selected for analysis 0043
Minimum chisq/dof for RH8,RH9,RH10 1.52, 2.69, 2.74
Event added to database
Sat Apr 30 21:42:26 2005
Event last processed
Wed Oct 15 14:20:02 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.006 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -531.7 ± 3.5 -596.2 ± 8.7
Vy GSE [km/s] 44.0 ± 5.8 51.0 ± 24.2
Vz GSE [km/s] -4.5 ± 16.3 -1.5 ± 27.4
Wi [km/s] 74.1 ± 1.2 82.0 ± 4.8
We [km/s] 2342.9 ± 38.7 2592.1 ± 151.3
Ni [n/cc] 5.7 ± 0.5 9.8 ± 0.8
Bx GSE [nT] 5.1 ± 0.6 4.3 ± 2.0
By GSE [nT] -4.5 ± 0.5 -6.6 ± 3.6
Bz GSE [nT] 0.5 ± 2.2 3.6 ± 4.7
Plasma Beta
1.306 ± 1.299
1.274 ± 1.236
Sound Speed [km/s]
95.76 ± 1.67
105.86 ± 6.21
Alfven Speed [km/s]
64.95 ± 2.24
73.19 ± 4.25

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.898 ± 0.171 0.432 ± 0.349 -0.081 ± 0.081 -4.67 ± 27.82 154.34 ± 22.24
VC -0.996 ± 0.028 0.088 ± 0.310 0.009 ± 0.009 0.52 ± 21.99 174.96 ± 17.86
MX1 -0.939 ± 0.169 0.298 ± 0.509 -0.175 ± 0.173 -10.05 ± 17.89 162.41 ± 31.06
MX2 -0.969 ± 0.082 0.188 ± 0.371 -0.160 ± 0.159 -9.23 ± 14.56 169.04 ± 21.91
MX3 -0.979 ± 0.062 0.151 ± 0.333 -0.136 ± 0.135 -7.82 ± 14.61 171.21 ± 19.46
RH08 -0.984 ± 0.004 0.165 ± 0.023 -0.073 ± 0.072 -4.16 ± 1.44 170.47 ± 1.34
RH09 -0.977 ± 0.015 0.199 ± 0.067 -0.073 ± 0.072 -4.16 ± 4.03 168.47 ± 3.95
RH10 -0.977 ± 0.015 0.199 ± 0.067 -0.073 ± 0.072 -4.16 ± 4.03 168.47 ± 3.95
Average -0.965 0.215 -0.095 -5.468 167.423
Median -0.977 0.199 -0.073 -4.165 169.037
Deviation 0.032 0.105 0.060 3.428 6.342

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 22.5 ± 6.5 639.0 ± 26.1 1.77 ± 0.19
VC 39.2 ± 7.7 687.6 ± 24.5 1.77 ± 0.19
MX1 29.3 ± 5.7 660.3 ± 24.0 1.77 ± 0.19
MX2 34.5 ± 5.5 675.0 ± 24.8 1.77 ± 0.19
MX3 36.2 ± 5.6 678.4 ± 25.0 1.77 ± 0.19
RH08 35.2 ± 6.3 682.3 ± 24.4 1.77 ± 0.19
RH09 33.5 ± 6.3 680.4 ± 24.3 1.77 ± 0.19
RH10 33.5 ± 6.3 680.4 ± 24.3 1.77 ± 0.19
Average 33.0 672.9 1.77
Median 34.5 680.4 1.77
Deviation 5.1 15.8 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 142.4 ± 2.7 57.1 ± 1.8 60.0 ± 2.1 100.6 ± 1.9 2.49 ± 0.06 1.42 ± 0.02
VC 154.3 ± 3.7 45.2 ± 1.4 50.3 ± 1.7 106.5 ± 2.2 3.41 ± 0.05 1.45 ± 0.02
MX1 147.5 ± 2.1 52.6 ± 1.6 56.7 ± 2.0 103.0 ± 2.1 2.80 ± 0.09 1.43 ± 0.03
MX2 150.8 ± 2.2 48.8 ± 1.5 53.5 ± 1.8 104.9 ± 2.1 3.09 ± 0.09 1.44 ± 0.03
MX3 150.5 ± 2.3 47.6 ± 1.4 52.4 ± 1.8 105.5 ± 2.2 3.16 ± 0.08 1.43 ± 0.03
RH8 151.8 ± 2.8 48.3 ± 1.5 53.0 ± 1.8 105.1 ± 2.2 3.14 ± 0.06 1.44 ± 0.02
RH9 151.8 ± 2.8 49.6 ± 1.5 54.2 ± 1.9 104.5 ± 2.1 3.06 ± 0.06 1.45 ± 0.02
RH10 151.8 ± 2.8 49.6 ± 1.5 54.2 ± 1.9 104.5 ± 2.1 3.06 ± 0.06 1.45 ± 0.02
Average 150.1 49.9 54.3 104.3 3.0 1.4
Median 151.8 49.6 54.2 104.9 3.1 1.4
Deviation 3.7 3.6 2.9 1.8 0.3 0.0

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 81.3 ± 11.8 64.0 ± 3.0 67.6 ± 3.9 111.7 ± 5.5 1.27 ± 0.20 0.73 ± 0.12
VC 89.2 ± 9.2 50.6 ± 2.1 56.7 ± 3.3 118.4 ± 5.2 1.77 ± 0.21 0.76 ± 0.10
MX1 85.3 ± 8.5 59.0 ± 2.7 63.8 ± 3.7 114.5 ± 5.3 1.45 ± 0.17 0.75 ± 0.10
MX2 87.5 ± 8.1 54.7 ± 2.4 60.3 ± 3.5 116.6 ± 5.3 1.60 ± 0.17 0.75 ± 0.10
MX3 86.7 ± 8.2 53.3 ± 2.3 59.1 ± 3.4 117.2 ± 5.2 1.63 ± 0.18 0.74 ± 0.10
RH8 87.3 ± 8.8 54.1 ± 2.3 59.8 ± 3.5 116.9 ± 5.3 1.62 ± 0.19 0.75 ± 0.10
RH9 87.4 ± 9.1 55.5 ± 2.4 61.0 ± 3.5 116.2 ± 5.3 1.58 ± 0.19 0.76 ± 0.10
RH10 87.4 ± 9.1 55.5 ± 2.4 61.0 ± 3.5 116.2 ± 5.3 1.58 ± 0.19 0.76 ± 0.10
Average 86.5 55.8 61.2 116.0 1.6 0.7
Median 87.4 55.5 61.0 116.6 1.6 0.8
Deviation 2.4 4.1 3.3 2.1 0.1 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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