CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 20011111506
Observation time: 04/21/2001 111.62963 1506 [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 2001
Fractional day of year 111.629630
Arrival time of shock [seconds of day] 54400.0 ± 32.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.035
Y GSE location of spacecraft [Re] 0.001
Z GSE location of spacecraft [Re] -0.004
Upstream plasma points selected for analysis 0011
Upstream field points selected for analysis 0046
Downstream plasma points selected for analysis 0012
Downstream field points selected for analysis 0054
Minimum chisq/dof for RH8,RH9,RH10 5.57, 10.90, 11.02
Event added to database
Sat Apr 30 21:51:02 2005
Event last processed
Tue May 3 13:57:42 2005
Method selected
RH08
Propagation delay to Earth [minutes]
0.009 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -350.3 ± 2.1 -394.1 ± 6.6
Vy GSE [km/s] -16.4 ± 1.9 -2.6 ± 5.2
Vz GSE [km/s] -10.0 ± 1.0 -9.0 ± 3.6
Wi [km/s] 20.8 ± 1.3 29.0 ± 3.6
We [km/s] 658.6 ± 41.8 918.6 ± 113.1
Ni [n/cc] 6.6 ± 0.5 14.9 ± 2.1
Bx GSE [nT] 1.8 ± 0.2 0.5 ± 2.1
By GSE [nT] -2.1 ± 0.2 -5.3 ± 1.0
Bz GSE [nT] 1.0 ± 0.1 1.7 ± 1.5
Plasma Beta
0.714 ± 0.696
0.768 ± 0.649
Sound Speed [km/s]
26.89 ± 1.71
37.50 ± 4.62
Alfven Speed [km/s]
24.81 ± 1.44
34.81 ± 3.94

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.874 ± 0.223 0.386 ± 0.433 -0.294 ± 0.285 -17.07 ± 25.00 156.15 ± 28.19
VC -0.954 ± 0.034 0.298 ± 0.108 0.017 ± 0.017 0.96 ± 4.23 162.66 ± 6.46
MX1 -0.970 ± 0.119 0.241 ± 0.473 0.046 ± 0.046 2.62 ± 21.15 166.05 ± 27.93
MX2 -0.953 ± 0.123 0.297 ± 0.389 0.064 ± 0.064 3.68 ± 20.26 162.69 ± 23.40
MX3 -0.939 ± 0.124 0.337 ± 0.338 0.072 ± 0.072 4.13 ± 22.91 160.24 ± 20.60
RH08 -0.993 ± 0.001 0.113 ± 0.010 -0.028 ± 0.028 -1.60 ± 0.57 173.48 ± 0.55
RH09 -0.996 ± 0.006 0.061 ± 0.069 -0.061 ± 0.061 -3.52 ± 4.03 176.49 ± 3.95
RH10 -0.996 ± 0.006 0.044 ± 0.069 -0.073 ± 0.072 -4.16 ± 4.03 177.49 ± 3.95
Average -0.959 0.222 -0.032 -1.871 166.909
Median -0.954 0.297 0.017 0.961 166.054
Deviation 0.041 0.132 0.119 6.909 7.962

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 24.3 ± 4.4 384.3 ± 11.6 2.24 ± 0.39
VC 37.7 ± 3.8 415.9 ± 12.7 2.24 ± 0.39
MX1 41.4 ± 3.8 421.6 ± 12.9 2.24 ± 0.39
MX2 39.4 ± 3.7 415.2 ± 12.8 2.24 ± 0.39
MX3 37.8 ± 3.7 408.9 ± 12.7 2.24 ± 0.39
RH08 45.6 ± 4.1 431.5 ± 12.9 2.24 ± 0.39
RH09 47.5 ± 4.1 432.4 ± 12.9 2.24 ± 0.39
RH10 48.1 ± 4.1 432.4 ± 12.9 2.24 ± 0.39
Average 40.2 417.8 2.24
Median 41.4 421.6 2.24
Deviation 7.7 16.2 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 81.5 ± 1.9 19.7 ± 0.9 22.6 ± 1.3 30.9 ± 1.4 4.15 ± 0.23 2.64 ± 0.15
VC 86.6 ± 2.1 16.0 ± 0.7 19.6 ± 1.1 32.9 ± 1.5 5.42 ± 0.28 2.63 ± 0.14
MX1 86.4 ± 2.1 14.9 ± 0.7 18.6 ± 1.1 33.4 ± 1.5 5.79 ± 0.30 2.59 ± 0.14
MX2 86.9 ± 2.1 15.5 ± 0.7 19.2 ± 1.1 33.2 ± 1.5 5.61 ± 0.29 2.63 ± 0.14
MX3 86.3 ± 2.1 16.0 ± 0.7 19.6 ± 1.1 32.9 ± 1.5 5.41 ± 0.29 2.63 ± 0.14
RH8 85.2 ± 2.1 13.7 ± 0.6 17.4 ± 1.0 33.9 ± 1.5 6.22 ± 0.31 2.52 ± 0.13
RH9 83.8 ± 2.1 13.2 ± 0.6 16.8 ± 1.0 34.2 ± 1.5 6.37 ± 0.32 2.46 ± 0.13
RH10 83.3 ± 2.1 13.0 ± 0.6 16.6 ± 1.0 34.2 ± 1.5 6.43 ± 0.32 2.44 ± 0.12
Average 85.0 15.2 18.8 33.2 5.7 2.6
Median 86.3 15.5 19.2 33.4 5.8 2.6
Deviation 2.0 2.1 2.0 1.1 0.7 0.1

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 38.2 ± 6.3 26.9 ± 1.9 31.7 ± 3.6 43.8 ± 2.2 1.43 ± 0.28 0.87 ± 0.14
VC 40.7 ± 7.1 22.0 ± 1.4 27.5 ± 3.1 46.5 ± 2.2 1.86 ± 0.38 0.88 ± 0.15
MX1 40.6 ± 7.1 20.6 ± 1.3 26.1 ± 3.0 47.2 ± 2.2 1.99 ± 0.40 0.86 ± 0.15
MX2 41.1 ± 7.2 21.3 ± 1.4 26.9 ± 3.0 46.8 ± 2.2 1.94 ± 0.40 0.88 ± 0.15
MX3 40.5 ± 7.2 22.0 ± 1.4 27.5 ± 3.1 46.5 ± 2.2 1.86 ± 0.39 0.87 ± 0.15
RH8 40.2 ± 6.8 18.9 ± 1.2 24.4 ± 2.8 47.8 ± 2.3 2.14 ± 0.41 0.84 ± 0.14
RH9 39.4 ± 6.6 18.1 ± 1.2 23.5 ± 2.7 48.1 ± 2.3 2.18 ± 0.41 0.82 ± 0.13
RH10 39.2 ± 6.6 17.9 ± 1.1 23.2 ± 2.6 48.2 ± 2.3 2.20 ± 0.41 0.81 ± 0.13
Average 40.0 21.0 26.4 46.9 2.0 0.9
Median 40.5 21.3 26.9 47.2 2.0 0.9
Deviation 1.0 2.9 2.8 1.4 0.3 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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