CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 20012241048
Observation time: 08/12/2001 224.45059 1048 [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 2001
Fractional day of year 224.450590
Arrival time of shock [seconds of day] 38931.0 ± 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] 0.003
Upstream plasma points selected for analysis 0011
Upstream field points selected for analysis 0049
Downstream plasma points selected for analysis 0009
Downstream field points selected for analysis 0035
Minimum chisq/dof for RH8,RH9,RH10 6.67, 18.88, 19.46
Event added to database
Sat Apr 30 21:51:51 2005
Event last processed
Tue May 3 14:01:40 2005
Method selected
RH08
Propagation delay to Earth [minutes]
0.008 ± 0.002

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -341.7 ± 1.9 -393.0 ± 3.8
Vy GSE [km/s] 14.8 ± 3.6 9.7 ± 4.7
Vz GSE [km/s] 17.5 ± 1.4 51.5 ± 4.7
Wi [km/s] 25.0 ± 1.1 38.3 ± 1.6
We [km/s] 790.6 ± 34.7 1211.8 ± 49.8
Ni [n/cc] 7.3 ± 0.7 35.1 ± 3.7
Bx GSE [nT] -2.9 ± 0.3 2.8 ± 1.3
By GSE [nT] -1.7 ± 0.5 -9.0 ± 0.6
Bz GSE [nT] 3.9 ± 0.2 6.5 ± 1.6
Plasma Beta
0.364 ± 0.388
0.820 ± 0.829
Sound Speed [km/s]
32.27 ± 1.42
49.47 ± 2.03
Alfven Speed [km/s]
41.70 ± 3.27
42.70 ± 2.94

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.645 ± 0.075 -0.241 ± 0.105 0.725 ± 0.559 46.47 ± 5.40 200.48 ± 9.08
VC -0.832 ± 0.044 -0.082 ± 0.092 0.548 ± 0.485 33.25 ± 4.49 185.61 ± 6.33
MX1 -0.665 ± 0.067 -0.272 ± 0.084 0.696 ± 0.553 44.07 ± 5.23 202.27 ± 6.93
MX2 -0.692 ± 0.062 -0.303 ± 0.078 0.655 ± 0.540 40.91 ± 5.06 203.64 ± 6.16
MX3 -0.696 ± 0.067 -0.307 ± 0.079 0.649 ± 0.537 40.43 ± 5.61 203.80 ± 6.13
RH08 -0.749 ± 0.010 -0.425 ± 0.009 0.508 ± 0.459 30.56 ± 1.24 209.58 ± 0.52
RH09 -0.718 ± 0.049 -0.375 ± 0.064 0.587 ± 0.508 35.92 ± 4.03 207.58 ± 4.90
RH10 -0.718 ± 0.049 -0.375 ± 0.064 0.587 ± 0.508 35.92 ± 4.03 207.58 ± 4.90
Average -0.714 -0.298 0.619 38.439 202.567
Median -0.696 -0.303 0.649 40.430 203.795
Deviation 0.058 0.106 0.074 5.452 7.503

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 8.7 ± 2.6 303.2 ± 5.2 4.83 ± 0.77
VC 24.6 ± 1.9 370.5 ± 5.4 4.83 ± 0.77
MX1 9.1 ± 2.6 309.5 ± 5.0 4.83 ± 0.77
MX2 10.7 ± 3.1 318.2 ± 4.8 4.83 ± 0.77
MX3 11.1 ± 3.2 319.4 ± 4.8 4.83 ± 0.77
RH08 19.1 ± 5.0 331.8 ± 4.3 4.83 ± 0.77
RH09 14.1 ± 4.5 323.7 ± 4.5 4.83 ± 0.77
RH10 14.1 ± 4.5 323.7 ± 4.5 4.83 ± 0.77
Average 13.9 325.0 4.83
Median 14.1 323.7 4.83
Deviation 5.5 20.4 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 73.6 ± 2.4 31.4 ± 1.3 41.2 ± 3.2 42.4 ± 3.1 2.35 ± 0.13 1.75 ± 0.16
VC 77.8 ± 2.2 27.0 ± 1.1 37.9 ± 3.0 45.3 ± 2.9 2.89 ± 0.16 1.72 ± 0.13
MX1 74.2 ± 2.5 31.3 ± 1.3 41.2 ± 3.2 42.5 ± 3.1 2.38 ± 0.13 1.76 ± 0.16
MX2 74.7 ± 2.6 30.9 ± 1.3 41.0 ± 3.2 42.7 ± 3.1 2.42 ± 0.14 1.76 ± 0.16
MX3 74.7 ± 2.6 30.9 ± 1.3 40.9 ± 3.2 42.8 ± 3.1 2.42 ± 0.14 1.76 ± 0.16
RH8 73.4 ± 2.9 28.7 ± 1.2 39.4 ± 3.1 44.2 ± 3.0 2.56 ± 0.16 1.67 ± 0.15
RH9 73.7 ± 2.7 30.1 ± 1.3 40.4 ± 3.2 43.3 ± 3.0 2.45 ± 0.15 1.71 ± 0.16
RH10 73.7 ± 2.7 30.1 ± 1.3 40.4 ± 3.2 43.3 ± 3.0 2.45 ± 0.15 1.71 ± 0.16
Average 74.5 30.1 40.3 43.3 2.5 1.7
Median 74.2 30.9 40.9 43.3 2.5 1.7
Deviation 1.4 1.5 1.1 1.0 0.2 0.0

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 14.6 ± 3.3 40.8 ± 2.1 42.2 ± 2.9 51.1 ± 1.2 0.35 ± 0.07 0.28 ± 0.06
VC 15.9 ± 3.6 34.5 ± 1.4 38.8 ± 2.7 55.6 ± 1.4 0.46 ± 0.09 0.29 ± 0.06
MX1 15.0 ± 3.2 40.7 ± 2.1 42.2 ± 2.9 51.2 ± 1.2 0.37 ± 0.07 0.29 ± 0.06
MX2 15.3 ± 3.2 40.1 ± 2.0 41.9 ± 2.9 51.6 ± 1.2 0.38 ± 0.07 0.30 ± 0.06
MX3 15.2 ± 3.2 40.0 ± 2.0 41.9 ± 2.9 51.7 ± 1.2 0.38 ± 0.07 0.29 ± 0.06
RH8 15.4 ± 3.1 36.9 ± 1.6 40.4 ± 2.8 54.0 ± 1.3 0.42 ± 0.07 0.28 ± 0.06
RH9 14.9 ± 3.1 38.9 ± 1.8 41.4 ± 2.9 52.6 ± 1.2 0.38 ± 0.07 0.28 ± 0.06
RH10 14.9 ± 3.1 38.9 ± 1.8 41.4 ± 2.9 52.6 ± 1.2 0.38 ± 0.07 0.28 ± 0.06
Average 15.2 38.8 41.3 52.6 0.4 0.3
Median 15.2 40.0 41.9 52.6 0.4 0.3
Deviation 0.4 2.2 1.2 1.5 0.0 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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