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The TGF Workshop 2011 was held on the campus of the University of Alabama in Huntsville (UAH) on Wednesday and Thursday, July 13th and 14th. The workshop  covered all aspects of Terrestrial Gamma-Ray Flash (TGF) science, including gamma-ray and radio observations, theory and future instruments. 

     Invited Speakers

Ashot Chilingarian (Artem Alikhanyan National Laboratory, Yerevan, Armenia): Thunderstorm Ground Enhancements (TGEs) – surface analog of TGFs
Joseph Dwyer (FIT): Theory
Gaopeng Lu (Duke): Radio Observations
Martino Marisaldi (INAF-IASF Bologna): AGILE Observations


The program is available.

     Presentations and posters

I1: J. Dwyer:                  Understanding the source mechanisms of terrestrial gamma-ray flashes
C1: U. Ebert:                 Electron run-away from streamers and leaders
C2: B. E. Carlson:          The TGF source luminosity distribution
C3: S. Arabshahi:          The role of the runaway breakdown – extensive air showers in thundercloud processes
C4: S. Foley:                 Temporal Properties of Fermi TGFs
C5: N. Ostgaard:          Occurrence frequency and fluence of TGFs (by Carlson)  
I2: A. Chilingarian:       Thunderstorm ground enhancements (TGEs) surface analog of the TGFs
C6: R. A. Ringuette:      Ground-based Observations of Terrestrial Gamma-Ray Flashes
C7: S. Gupta:                Search for particle acceleration during thunderstorm activity with the GRAPES-3 tracking muon detector
I3: M. Marisaldi:            AGILE Observations of Terrestrial Gamma-Ray Flashes
C8: G. J. Fishman:         Observations of TGFs with BATSE
C9: D. Smith:                Status of ADELE and RHESSI observations
C10: M. S. Briggs:         More TGFs from GBM
C11: V. Connaughton:  What can geolocated sferics tell us about Terrestrial Gamma-ray Flashes
C12: P.-L. Blelly:           The new XGRE instrument onboard TARANIS mission
I4: G. Lu:                       Implications of radio frequency measurements for lightning processes associated with terrestrial gamma-ray flashes
C13: M. Hutchins:         Relative power of terrestrial gamma ray flash correlated lightning stroke to local stroke activity
C14: S. Cummer:          The lightning-TGF relationship on microsecond timescales
C15: J. Montanyà:         Research on X rays produced by natural cloud-to-ground lightning in Spain
P1: P. H. Bhat:               Effects of recording dead time and pulse pile-up in the TGF data recorded by GBM
P2: E. S. Cramer:           Accurately Modeling Terrestrial Gamma-Ray Flashes Observed with GBM
P3: J. E. Grove:              Search for Terrestrial Gamma-ray Flashes with Fermi LAT
P4: C. Koehn:                Modeling Bremsstrahlung and calculating energies and angles of hard photons ahead of lightning leaders
P5: S. Sadighi:               Streamer Emission from Thundercloud Hydrometeors
P6: T. Sakamoto:           Sprite observations by GRT-WF: - Correlative study of Sprites and TGFs.
P7: F. São Sabbas:         Cosmic Ray Count Rate Increases Associated with Thunderstorm Electric Field Variations
P8: M. Schaal:               Electron Luminosity Measurements from Natural and Rocket-and-Wire Triggered Lightning using the Thunderstorm Energetic Radiation Array (TERA)
P9: M. Splitt:                 Thunderstorm morphology of WWLLN located Terrestrial Gamma-Ray Flashes observed by FERMI-GBM
P10: S. Xiong:               Location prediction of Electron TGFs

     Sponsor and Organizers

The TGF Workshop 2011 is sponsored by The Center for Space Plasma and Aeronomic Research (CSPAR) at The University of Alabama in Huntsville (UAH). Many of the scientists of the Fermi Gamma-Ray Burst Monitor (GBM) team, both from UAH and NASA/MSFC, are located at the NSSTC. Workshop attendees will be able to view the GBM Operations Center and spare GBM flight hardware.

General questions for both the LOC and SOC should be emailed to

Local Organizing Committee (University of Alabama in Hunstville)

Veronica Belser
Michael Briggs
Elizabeth Comer
Valerie Connaughton
Shaolin Xiong

Scientific Organizing Committee

Michael Briggs (University of Alabama in Hunstville) (
Brant Carlson (University of Bergen) (
Valerie Connaughton (University of Alabama in Hunstville) (
David Smith (University of California, Santa Cruz) (

Meeting Locations

The meeting locations on the UAH campus can be found on this map.  The scientific sessions will take place in Business Administration Building (#14) and the Reception and Lunches in the nearby Shelby Center For Science and Technology (#17).