CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19981761543
Observation time: 06/25/1998 176.65498 1543 [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 176.654977
Arrival time of shock [seconds of day] 56590.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.036
Y GSE location of spacecraft [Re] 0.005
Z GSE location of spacecraft [Re] -0.001
Upstream plasma points selected for analysis 0009
Upstream field points selected for analysis 0042
Downstream plasma points selected for analysis 0009
Downstream field points selected for analysis 0035
Minimum chisq/dof for RH8,RH9,RH10 17.75, 22.16, 23.93
Event added to database
Sat Apr 30 21:42:38 2005
Event last processed
Wed Oct 15 14:23:15 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.008 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -395.7 ± 1.3 -417.8 ± 4.8
Vy GSE [km/s] -11.8 ± 1.9 -35.2 ± 4.7
Vz GSE [km/s] -12.2 ± 1.2 -13.5 ± 2.5
Wi [km/s] 12.7 ± 1.0 19.4 ± 0.9
We [km/s] 400.9 ± 31.1 615.0 ± 29.9
Ni [n/cc] 13.1 ± 1.1 22.6 ± 1.7
Bx GSE [nT] -5.6 ± 0.3 -0.8 ± 0.8
By GSE [nT] 0.0 ± 0.4 -4.4 ± 0.7
Bz GSE [nT] 9.1 ± 0.2 14.9 ± 0.4
Plasma Beta
0.039 ± 0.039
0.074 ± 0.081
Sound Speed [km/s]
16.37 ± 1.27
24.91 ± 1.10
Alfven Speed [km/s]
64.03 ± 2.59
71.20 ± 2.98

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.709 ± 0.063 0.148 ± 0.042 0.689 ± 0.551 43.57 ± 5.34 168.24 ± 3.24
VC -0.688 ± 0.135 -0.725 ± 0.129 -0.040 ± 0.040 -2.31 ± 4.69 226.50 ± 10.70
MX1 -0.810 ± 0.342 -0.579 ± 0.477 0.099 ± 0.098 5.67 ± 23.92 215.55 ± 33.71
MX2 -0.685 ± 0.115 -0.728 ± 0.108 -0.011 ± 0.011 -0.65 ± 10.91 226.75 ± 9.07
MX3 -0.677 ± 0.071 -0.736 ± 0.066 -0.011 ± 0.011 -0.65 ± 6.52 227.38 ± 5.55
RH08 -0.564 ± 0.012 -0.825 ± 0.008 -0.028 ± 0.028 -1.60 ± 0.73 235.65 ± 0.84
RH09 -0.606 ± 0.050 -0.795 ± 0.038 0.028 ± 0.028 1.60 ± 3.60 232.65 ± 3.58
RH10 -0.606 ± 0.051 -0.795 ± 0.039 0.028 ± 0.028 1.60 ± 3.76 232.65 ± 3.66
Average -0.668 -0.629 0.094 5.903 220.673
Median -0.677 -0.728 0.028 1.601 227.384
Deviation 0.076 0.323 0.244 15.424 22.047

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 16.6 ± 2.5 298.4 ± 10.0 1.74 ± 0.25
VC 71.2 ± 1.2 357.1 ± 18.0 1.74 ± 0.25
MX1 59.7 ± 1.2 400.3 ± 16.3 1.74 ± 0.25
MX2 69.8 ± 1.2 355.7 ± 18.0 1.74 ± 0.25
MX3 70.1 ± 1.2 352.5 ± 18.1 1.74 ± 0.25
RH08 74.5 ± 1.4 307.2 ± 19.1 1.74 ± 0.25
RH09 70.3 ± 1.4 323.5 ± 18.7 1.74 ± 0.25
RH10 70.3 ± 1.4 323.5 ± 18.7 1.74 ± 0.25
Average 62.8 339.8 1.74
Median 70.3 352.5 1.74
Deviation 19.2 33.1 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 27.8 ± 1.4 15.6 ± 1.2 61.4 ± 2.5 64.2 ± 2.6 1.79 ± 0.18 0.43 ± 0.04
VC 75.8 ± 1.1 5.1 ± 0.4 20.6 ± 0.8 65.9 ± 2.6 14.88 ± 1.14 1.15 ± 0.06
MX1 74.2 ± 1.0 8.1 ± 0.6 32.3 ± 1.3 65.6 ± 2.6 9.26 ± 0.72 1.13 ± 0.06
MX2 75.7 ± 1.1 5.5 ± 0.4 22.1 ± 0.9 65.9 ± 2.6 13.85 ± 1.06 1.15 ± 0.06
MX3 75.7 ± 1.1 5.4 ± 0.4 21.8 ± 0.9 65.9 ± 2.6 14.01 ± 1.08 1.15 ± 0.06
RH8 73.9 ± 1.2 4.3 ± 0.3 17.1 ± 0.7 66.0 ± 2.6 17.46 ± 1.35 1.12 ± 0.06
RH9 74.4 ± 1.2 5.4 ± 0.4 21.6 ± 0.9 65.9 ± 2.6 13.93 ± 1.08 1.13 ± 0.06
RH10 74.4 ± 1.2 5.4 ± 0.4 21.6 ± 0.9 65.9 ± 2.6 13.93 ± 1.08 1.13 ± 0.06
Average 69.0 6.8 27.3 65.6 12.4 1.1
Median 74.4 5.4 21.8 65.9 13.9 1.1
Deviation 16.7 3.7 14.4 0.6 4.8 0.2

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 17.1 ± 3.8 23.7 ± 1.0 68.2 ± 2.9 71.6 ± 2.9 0.72 ± 0.18 0.24 ± 0.05
VC 43.2 ± 2.4 7.6 ± 0.3 22.9 ± 1.0 75.1 ± 2.6 5.69 ± 0.37 0.58 ± 0.04
MX1 42.8 ± 2.8 12.0 ± 0.5 35.9 ± 1.5 74.5 ± 2.6 3.56 ± 0.28 0.57 ± 0.05
MX2 43.2 ± 2.4 8.2 ± 0.3 24.6 ± 1.0 75.0 ± 2.6 5.29 ± 0.35 0.58 ± 0.04
MX3 43.1 ± 2.4 8.1 ± 0.3 24.3 ± 1.0 75.0 ± 2.6 5.35 ± 0.35 0.58 ± 0.04
RH8 41.6 ± 2.4 6.3 ± 0.2 19.1 ± 0.8 75.2 ± 2.6 6.59 ± 0.44 0.55 ± 0.04
RH9 42.0 ± 2.5 8.0 ± 0.3 24.0 ± 1.0 75.0 ± 2.6 5.27 ± 0.36 0.56 ± 0.04
RH10 42.0 ± 2.5 8.0 ± 0.3 24.0 ± 1.0 75.0 ± 2.6 5.27 ± 0.36 0.56 ± 0.04
Average 39.4 10.2 30.4 74.5 4.7 0.5
Median 42.8 8.1 24.3 75.0 5.3 0.6
Deviation 9.0 5.7 16.0 1.2 1.8 0.1

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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