Lightning Mapping Arrays: Technical Status and Developments

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Three Types of Electrical Discharges -30 -50 Discrete short duration (< 100 ms) Discrete long duration (< 1 sec) Power(dBm) -70 Continuous Sparking Thee types of electrical activity: 05:25 05:30 05:35 1) Continuous sparking, presumably in hot gases at the mouth of the crater 2) Short-duration discharges, presumably negative leaders ascending into positive charge during rapid vertical development of the volcanic plume 3) Longer duration lightning discharges, with both vertical and horizontal development, in the anvil of the volcanic plume
Redoubt Volcano Eruptions, Alaska, March 22 – April 4, 2009 22 eruptions; 4-station Lightning Mapping Network ( )
Page 1: Lightning Mapping Arrays: Technical
Page 4 and 5: Height vs. N-S Example of a highly
Page 6 and 7: VHF Time-Of-Arrival (TOA) Total Lig
Page 8 and 9: VHF Frequency Spectrum LMA stations
Page 10 and 11: Oklahoma LMA ● Eleven-station net
Page 12 and 13: Oklahoma LMA ● For 11 station net
Page 14 and 15: VHF Time-Of-Arrival (TOA) Total Lig
Page 16 and 17: ● Decimated data or full data?
Page 18 and 19: Portable LMA Stations • Electroni
Page 20 and 21: Received signal at Homer during the
Page 22 and 23: 700 ms horizontally extensive light
Page 26 and 27: March 28, 2009 eruption ● ~30 min
Page 29 and 30: Comparison of NEXRAD and Lightning
Page 31 and 32: DC Lightning Mapping Array ● Expe
Page 33 and 34: Bolt from the Blue Discharge © Har
Page 35 and 36: Sept 8, 2006
Page 37 and 38: DC LMA diagnostic webpage Data inge
Page 39 and 40: April 4, 2007 ● 10 min time inter
Page 41 and 42: Intracloud Discharge (+) (--) ● B
Page 43 and 44: Low IC Discharges ● Between negat
Page 45: May 13, 2007 ● Active lower (+) r
Page 49 and 50: AWIPS Display, NWS Forecast Office,
Page 51 and 52: Total Lightning Observations
Page 53 and 54: May 27, 2007
Page 55 and 56: February 22, 2007 Winter storm, low
Page 57 and 58: REFERENCE: Thomas, R.J., P.R. Krehb
Page 59 and 60: WSMR - Aircraft sparking observatio
Page 61 and 62: Total Lightning Observations ● Cl
Page 63 and 64: Tornadic Storm, June 29, STEPS 2000
Page 65 and 66: DC LMA Stations (Urban Network) How
Page 67: DC LMA diagnostic web table Decembe
Page 72: 5 min intvl
Page 76 and 77:
Oklahoma Lightning Mapping Array (U
Page 78 and 79:
Concluding Remarks ● Very helpful
Page 80:
Cloud-t o-Ground Light ning
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Lightning Mapping Arrays: Technical Status and Developments

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