positive and negative discharges: electric and magnetic field variation presenter: hripsime...
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![Page 1: Positive and negative discharges: electric and magnetic field variation Presenter: Hripsime Mkrtchyan Supervisor: Ashot Chilingarian](https://reader036.vdocuments.net/reader036/viewer/2022070418/56649f4a5503460f94c6bf7f/html5/thumbnails/1.jpg)
Positive and negative discharges: electric and magnetic field variation
Presenter: Hripsime MkrtchyanSupervisor: Ashot Chilingarian
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• Instrumentation, their locationsInstrumentation, their locations• Joint measurementsJoint measurements• Negative and positive discharges , their differencesNegative and positive discharges , their differences• Magnetic field during dischargesMagnetic field during discharges
Overview
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Vantage Pro2
Boltek EFM-100
Lightning Detector(Boltek)
Outside 3 &1 cm plastic scintillator detectors
Step changes in Field magnitude indicate lightning
Lemi-417
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The Top Of Mount Aragats
Yeravan
The Lake of Aragats
Geovision gv-bx1500
All Sky Cam 180°
Mount Ararat
The Geographical locations of The Aragats Cameras
The count of the cameras: 3Framerate: Up to 30fpsThe installed height: 3200m.
LINKSYS LCAD03VLNOD 1080p
3MP
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Joint measurements on May 23Joint measurements on May 23
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More then 486 discharge events were registered More then 486 discharge events were registered during this day from which 321 were positive during this day from which 321 were positive
and 165 negative discharges.and 165 negative discharges.
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Positive and Negative dischargesPositive and Negative discharges
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Some Interesting Pictures At Byurakan During 2015.05.23
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Some Interesting Pictures At Byurakan During 2015.05.23
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Some Interesting Pictures At Byurakan During 2015.05.23
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Some Interesting Pictures At Byurakan During 2015.05.23
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Some Interesting Pictures At Byurakan During 2015.05.23
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Histogram of the time from the start of the electric-field sharp decrease (enhancement ) till its minimum (maximum)
positive once 0.05 to 0.55 second, and for negative ones 0.1-0.99positive once 0.05 to 0.55 second, and for negative ones 0.1-0.99
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Histogram of the Amplitude of the electric-field sharp changes: a) for positive and b) for negative
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For Electric field (E):For Electric field (E):
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Slope and Constant distribution Slope and Constant distribution histograms for 139 negative histograms for 139 negative
discharges. discharges.
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Correlation between slope and Correlation between slope and constant of power fit function constant of power fit function for selected 25 events. for selected 25 events.
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Correlation between discharge amplitude and Speed of decay
(for first 60 data) with R = 0.87
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Magnetic fieldMagnetic field
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Magnetic field’s jumpsMagnetic field’s jumps
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By Aragats measurementsBy Aragats measurements
Date/Time B_x B_y B_z By components Electric field
13:42:49 -16.3 -3.69 2.1 16.84 -3213:41:20 -3.7 -0.94 2 4.31 -41
14:00:02 -0.6 -0.61 1.2 1.47 -3.3
15:20:47 -0.4 -0.12 0.4 0.58 15.8
15:45:03 0.4 -2.03 2.7 3.40 46.616:17:26 0.6 0.69 0.4 1.00 415:35:27 0.6 -0.83 0.9 1.36 3716:41:18 0.8 1.72 -1.1 2.19 2.8514:13:26 1.7 2.61 -1.9 3.65 13.814:05:14 1.8 -6.61 6 9.11 -51.213:46:19 2.2 -1.81 1.6 3.27 -33.713:45:12 2.3 0.41 -0.8 2.47 -23.713:46:05 3 1.6 -0.7 3.47 -4.117:29:36 6 13.65 8.8 17.31 -6.417:22:33 13 -3.76 -3.2 13.91 -10.517:05:00 14.2 11.7 -8 20.06 -5.4517:11:30 15.9 10.83 -6.7 20.37 -14.25
17:37:53 18 6.34 -8.7 20.97 -18.2
type
++
+
-
-----++++++++
+
Date/Time B_x B_y B_z By components Electric field
13:42:49 -16.3 -3.69 2.1 16.84 -3213:41:20 -3.7 -0.94 2 4.31 -41
14:00:02 -0.6 -0.61 1.2 1.47 -3.3
15:20:47 -0.4 -0.12 0.4 0.58 15.8
15:45:03 0.4 -2.03 2.7 3.40 46.616:17:26 0.6 0.69 0.4 1.00 415:35:27 0.6 -0.83 0.9 1.36 3716:41:18 0.8 1.72 -1.1 2.19 2.8514:13:26 1.7 2.61 -1.9 3.65 13.814:05:14 1.8 -6.61 6 9.11 -51.213:46:19 2.2 -1.81 1.6 3.27 -33.713:45:12 2.3 0.41 -0.8 2.47 -23.713:46:05 3 1.6 -0.7 3.47 -4.117:29:36 6 13.65 8.8 17.31 -6.417:22:33 13 -3.76 -3.2 13.91 -10.517:05:00 14.2 11.7 -8 20.06 -5.4517:11:30 15.9 10.83 -6.7 20.37 -14.25
17:37:53 18 6.34 -8.7 20.97 -18.2
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By Nor Amberd measurements By Nor Amberd measurements
Date/Time B_x B_y B_z By components Electric field type
17:11:30 -5.4 16.59 -7.9 19.15 31.7 +
15:20:47 -2.7 -0.18 -0.2 2.71 56.2 -
15:11:18 -2.5 -3.07 -1.2 4.14 19.5 -(cg)
17:05:00 -2 13.72 -4.7 14.64 86 -
16:14:34 -1.9 -5.01 1.8 5.65 22.7 -(cg)
16:49:17 -1.8 0.78 1.5 2.47 64.6 -
16:25:52 -1.1 -0.73 0.3 1.35 28.45 -(ic)
16:54:00 -1 -6.17 -0.7 6.29 61 -
16:17:26 -0.9 2.82 -0.9 3.09 4.4 -
15:17:36 -0.3 -0.29 0 0.42 13.4 -
16:30:26 0.3 -0.08 0.2 0.37 52.3 -
15:35:27 0.6 -1.02 0.8 1.43 57.6 -
16:33:50 1.2 -0.59 -0.4 1.40 26.3 -
17:29:36 5.5 17.08 -16.6 24.44 47.05 +
17:46:10 8.1 15.12 15.9 23.39 54.2 +
17:22:33 13.3 -0.65 5.2 14.30 50.8 +
17:37:53 29.4 22.96 -6.4 37.85 44.35 +
Date/Time B_x B_y B_z By components Electric field type
17:11:30 -5.4 16.59 -7.9 19.15 31.7 +
15:20:47 -2.7 -0.18 -0.2 2.71 56.2 -
15:11:18 -2.5 -3.07 -1.2 4.14 19.5 -(cg)
17:05:00 -2 13.72 -4.7 14.64 86 -
16:14:34 -1.9 -5.01 1.8 5.65 22.7 -(cg)
16:49:17 -1.8 0.78 1.5 2.47 64.6 -
16:25:52 -1.1 -0.73 0.3 1.35 28.45 -(ic)
16:54:00 -1 -6.17 -0.7 6.29 61 -
16:17:26 -0.9 2.82 -0.9 3.09 4.4 -
15:17:3615:17:36 -0.3-0.3 -0.29-0.29 00 0.420.42 13.413.4 --
16:30:26 0.3 -0.08 0.2 0.37 52.3 -
15:35:27 0.6 -1.02 0.8 1.43 57.6 -
16:33:50 1.2 -0.59 -0.4 1.40 26.3 -
17:29:36 5.5 17.08 -16.6 24.44 47.05 +
17:46:10 8.1 15.12 15.9 23.39 54.2 +
17:22:33 13.3 -0.65 5.2 14.30 50.8 +
17:37:53 29.4 22.96 -6.4 37.85 44.35 +
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1.73*0.0001
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SummarySummary
• Negative discharges are longer then positive one.
• Positives’ amplitudes are larger.
• Negative discharge generate smaller changes in
magnetic field
• Positive lightning generate strong magnetic field
variation then negative one
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