18:30Science Cafe09/06/2015BBC Radio Wales Duration: 30 minutes Tue 9th Jun 2015, 18:30 on BBC Radio Wales FMAdam Walton explores why earthquakes happen and how seismic data is recorded.GenresFactualScience & NatureFactualScience & NatureScience & TechnologyFormatsMagazines & ReviewsBrandScience Cafe Source: BBC Online