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This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited., Narrow Bipolar Events (NBEs) are powerful radio emissions from thunderstorms, which have been recently associated with blue optical flashes on cloud tops and attributed to extensive streamer electrical discharges named fast breakdown. Combining data obtained from a thunderstorm over South China by the space-based Atmosphere Space Interactions Monitor, the Vaisala GLD360 global lightning network and very low frequency/low frequency radio detectors, here we report and analyze for the first time the optical emissions of blue luminous events associated with negative NBEs and located at the top edge of a thundercloud. These emissions are weakly affected by scattering from cloud droplets, allowing us to estimate the source extension and optical energy involved in the process. The optical energy in the 337-nm band emitted by fast breakdown is about 104 J, which involves around 109 streamer initiation events. © 2021. The Authors., This work was supported by the European Research Council (ERC) under the European Union H2020 programme/ERC grant agreement 681257. It also received funding from the European Union Horizon 2020 research and innovation programme under the M. Sklodowska-Curie grant agreement SAINT 722337. Additionally, this work was supported by the Spanish Ministry of Science and Innovation, MINECO, under project PID2019-109269RB-C43 and FEDER program. D. Li, A. Luque and F. J. Gordillo-Vázquez acknowledge financial support from the State Agency for Research of the Spanish MCIU through the “Center of Excellence Severo Ochoa” award for the Instituto de Astrofísica de Andalucía (SEV-2017-0709). F. Liu, G. Lu and B. Zhu are supported by the National Key Research and Development Program of China (2017YFC1501501) and National Natural Science Foundation of China (41775004, 41875006, 42005068, U1938115).

This dataset accompanies the paper in the AGUJournal of Geophysical Research: Atmospheres"A simultaneous observation of lightning by ASIM, Colombia-Lightning Mapping Array, GLM and ISS-LIS" and contains data of the lightning flash in Colombia detected by: Colombia Lightning Mapping Array Atmosphere-Space Interactions Monitor - Modular Multi-spectral Imaging Array (ASIM MMIA) Geostationary Lightning Mapper (GLM) Lightning Imaging Sensor on the International Space Station (ISS-LIS) Barrancabermeja weather radar (IDEAM - Colombian Radar Network) Sounding temperature data Cloud-to-ground data (LINET-Keraunos) ELF magnetic field data from Cape Verde UPC station For any questions, contact the first author. NOTES Colombia Lightning Mapping Array The file 'Colombia_LMA.zip' includes: 10 min LMA output text file: 'LYLOUT_181122_085000_0600.dat' LMA sources of the investigated flashfiltered with the method described in van der Velde and Montanyà (2013): 'LMA_noise_reduced.txt' In addition the file 'Supplementary_LMA_and_OpticalDepth.docx' includes plots of the LMA flash with filtered and unfiltered data Data from Atmosphere-Space Interactions Monitor - Modular Multi-spectral Imaging Array (ASIM MMIA) MMIA original data files can be obtained from:https://asdc.space.dtu.dk The files that containthe event are: mmiatriggeredobservationtmlevel1_observation_time_2018-11-22_08-57-21_observation_id_5154.cdf mmiatriggeredobservationtmlevel1_observation_time_2018-11-22_08-57-21_observation_id_5155.cdf Here,numerical data of the photometersand images extracted from these files are included in the file'MMIA.zip' that contains: 'MMIA_181122L1.txt':In this file the first column is UT time in seconds, second column corresponds to 337.0 nm photometer, third column to 180-230 nm and the fourth column to 777.4 nm. 'CHU_181122L1.zip': MMIA 777.4 nm (CHU2)and 337.0 nm (CHU1)camera images. Raster (.asc) and georeferenced (.tiff) images are provided. Geostationary Lightning Mapper (GLM) The file 'GLM_2018_11_22.txt' contains GLM data extracted from the repository indicated in the paper. Lightning Imaging Sensor on the International Space Station (ISS-LIS) The file 'LIS_2018-11-22.csv' contains ISS-LIS data extracted from the repository indicated in the paper. BarrancabermejaWeather radar (IDEAM - Colombian Radar Network) The file 'radar.zip' contains radar images including cross-sections. The original files can be obtained from: https://registry.opendata.aws/ideam-radares/ The used data fileare: BAR181122090846.RAWZJN5 Temperature profile The file '326_0900_Sounding_2.txt' contains the used temperature profile. Cloud-to-ground data: Date hh mm ss LAT LON kA 20181122 8 57 21.845 7.4770 -73.84360 -24 20181122 8 57 22.167 7.48450 -73.81760 10.7 ELF magnetic field data from Cape Verde UPC station The file 'HPhi.txt' contains time (column 1) in seconds and magnetic field (column 2) in A/m for the event.&nbsp

The data that support the findings of the paper "Blue Flashes as Counterparts to Narrow Bipolar Events: The Optical Signal of Shallow In-Cloud Discharges". Data Description: Cloudscat_data: The modeling data based on Cloudscat model for eight Blue LUminous Events (BLUEs). MMIA_data: The photometer signals and its images for eight Blue LUminous Events (BLUEs) measured from the Modular Multispectral Imaging Array (MMIA) of ASIM. New_eq2_data: The modeling data based on the proposed eqation(2) for eight Blue LUminous Events (BLUEs).