CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19982672313
Observation time: 09/24/1998 267.96764 2313 [UT]

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


General Information (About, Top)

Year 1998
Fractional day of year 267.967639
Arrival time of shock [seconds of day] 83604.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.038
Y GSE location of spacecraft [Re] -0.005
Z GSE location of spacecraft [Re] 0.002
Upstream plasma points selected for analysis 0011
Upstream field points selected for analysis 0043
Downstream plasma points selected for analysis 0010
Downstream field points selected for analysis 0040
Minimum chisq/dof for RH8,RH9,RH10 16.10, 38.20, 40.28
Event added to database
Sat Apr 30 21:43:04 2005
Event last processed
Wed Oct 15 14:37:39 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.005 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -435.6 ± 6.5 -598.6 ± 10.9
Vy GSE [km/s] 25.6 ± 4.6 -23.7 ± 6.5
Vz GSE [km/s] 17.3 ± 10.6 -47.2 ± 5.4
Wi [km/s] 47.1 ± 2.5 80.4 ± 2.4
We [km/s] 1490.1 ± 77.5 2542.6 ± 75.1
Ni [n/cc] 9.9 ± 0.8 21.0 ± 2.2
Bx GSE [nT] -7.0 ± 1.2 -15.8 ± 2.5
By GSE [nT] 11.9 ± 0.5 30.1 ± 3.4
Bz GSE [nT] 3.4 ± 1.6 17.0 ± 2.0
Plasma Beta
0.233 ± 0.237
0.200 ± 0.210
Sound Speed [km/s]
60.70 ± 3.20
103.97 ± 3.08
Alfven Speed [km/s]
98.19 ± 4.25
181.08 ± 11.02

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.848 ± 0.341 0.246 ± 0.710 -0.469 ± 0.431 -27.96 ± 34.78 163.83 ± 47.66
VC -0.897 ± 0.021 -0.269 ± 0.033 -0.350 ± 0.335 -20.48 ± 3.11 196.70 ± 2.05
MX1 -0.921 ± 0.031 -0.204 ± 0.104 -0.332 ± 0.319 -19.40 ± 3.59 192.48 ± 6.48
MX2 -0.922 ± 0.030 -0.213 ± 0.093 -0.322 ± 0.311 -18.80 ± 3.97 192.99 ± 5.74
MX3 -0.923 ± 0.031 -0.217 ± 0.087 -0.317 ± 0.306 -18.49 ± 4.29 193.23 ± 5.38
RH08 -0.936 ± 0.003 -0.191 ± 0.009 -0.296 ± 0.287 -17.22 ± 0.55 191.53 ± 0.58
RH09 -0.996 ± 0.007 0.044 ± 0.069 -0.084 ± 0.084 -4.81 ± 4.02 177.49 ± 3.99
RH10 -0.996 ± 0.006 0.044 ± 0.069 -0.073 ± 0.072 -4.16 ± 4.03 177.49 ± 3.95
Average -0.930 -0.095 -0.280 -16.415 185.718
Median -0.922 -0.191 -0.317 -18.494 192.478
Deviation 0.049 0.183 0.135 8.054 11.486

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 59.5 ± 7.3 665.3 ± 3.1 2.12 ± 0.33
VC 82.8 ± 6.3 726.7 ± 3.8 2.12 ± 0.33
MX1 78.7 ± 6.3 738.6 ± 3.8 2.12 ± 0.33
MX2 78.9 ± 6.2 739.1 ± 3.8 2.12 ± 0.33
MX3 79.1 ± 6.2 739.3 ± 3.8 2.12 ± 0.33
RH08 77.1 ± 6.2 744.8 ± 3.8 2.12 ± 0.33
RH09 60.1 ± 5.6 751.0 ± 3.5 2.12 ± 0.33
RH10 59.9 ± 5.5 750.4 ± 36.4 2.12 ± 0.33
Average 72.0 731.9 2.12
Median 78.7 739.3 2.12
Deviation 10.2 28.0 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 297.4 ± 9.2 26.9 ± 0.9 49.8 ± 2.2 112.4 ± 2.7 11.08 ± 0.49 2.65 ± 0.07
VC 348.5 ± 9.7 6.5 ± 0.2 12.3 ± 0.5 115.3 ± 2.6 53.81 ± 2.18 3.02 ± 0.08
MX1 348.2 ± 9.5 10.1 ± 0.3 19.3 ± 0.8 115.1 ± 2.6 34.35 ± 1.40 3.03 ± 0.08
MX2 348.0 ± 9.4 9.9 ± 0.3 18.8 ± 0.8 115.1 ± 2.6 35.13 ± 1.43 3.02 ± 0.08
MX3 347.9 ± 9.4 9.8 ± 0.3 18.6 ± 0.8 115.1 ± 2.6 35.50 ± 1.44 3.02 ± 0.08
RH8 347.0 ± 9.2 11.5 ± 0.4 21.9 ± 0.9 114.9 ± 2.6 30.12 ± 1.22 3.02 ± 0.07
RH9 317.7 ± 7.1 26.4 ± 0.8 48.9 ± 2.1 112.5 ± 2.7 12.07 ± 0.51 2.82 ± 0.06
RH10 316.4 ± 7.0 26.5 ± 0.9 49.2 ± 2.1 112.4 ± 2.7 11.94 ± 0.50 2.81 ± 0.06
Average 333.9 16.0 29.8 114.1 28.0 2.9
Median 347.9 11.5 21.9 115.1 34.3 3.0
Deviation 20.3 8.9 16.3 1.4 15.2 0.1

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 141.3 ± 9.4 46.9 ± 1.3 91.8 ± 5.6 203.6 ± 9.9 3.02 ± 0.25 0.70 ± 0.06
VC 166.8 ± 11.2 11.3 ± 0.3 22.7 ± 1.4 208.6 ± 9.8 14.75 ± 1.29 0.80 ± 0.07
MX1 167.0 ± 11.2 17.7 ± 0.5 35.5 ± 2.2 208.1 ± 9.8 9.43 ± 0.82 0.80 ± 0.07
MX2 166.8 ± 11.2 17.3 ± 0.5 34.7 ± 2.1 208.2 ± 9.8 9.64 ± 0.85 0.80 ± 0.07
MX3 166.7 ± 11.2 17.1 ± 0.5 34.4 ± 2.1 208.2 ± 9.8 9.74 ± 0.86 0.80 ± 0.07
RH8 166.2 ± 11.3 20.1 ± 0.6 40.3 ± 2.5 207.9 ± 9.8 8.27 ± 0.73 0.80 ± 0.07
RH9 152.2 ± 10.8 46.0 ± 1.3 90.2 ± 5.5 203.8 ± 9.9 3.32 ± 0.30 0.75 ± 0.07
RH10 151.6 ± 10.8 46.3 ± 1.3 90.7 ± 5.5 203.7 ± 9.9 3.28 ± 0.30 0.75 ± 0.07
Average 159.8 27.9 55.1 206.5 7.7 0.8
Median 166.7 20.1 40.3 208.1 9.4 0.8
Deviation 10.0 15.5 30.1 2.4 4.2 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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