WWLLN: Mapping Global Lightning Strikes with a Worldwide Sensor Network

The World Wide Lightning Location Network (WWLLN) operated by the University of Washington uses a global network of very low frequency (VLF) radio sensors to map global lightning activity. By analyzing the time differences of arrival of lightning-generated radio signals at different sensors, the network pinpoints lightning strikes. While ideally hundreds of sensors are needed for uniform coverage, WWLLN currently boasts over 70 and continues to seek more hosting sites. Data is available for research purposes via various avenues, including free monthly subscriptions for site hosts and paid archival data.