Earthquake fag here, probable mining detonation in Utah (Depth:-2.7km) but definitely an above ground explosion.

http://quake.utah.edu

https://earthquake.usgs.gov/earthquakes/map/#%7B%22autoUpdate%22%3A%5B%22autoUpdate%22%5D%2C%22basemap%22%3A%22terrain%22%2C%22feed%22%3A%221day_all%22%2C%22listFormat%22%3A%22default%22%2C%22mapposition%22%3A%5B%5B30.90222470517144%2C-117.70751953125%5D%2C%5B43.46886761482923%2C-100.21728515624999%5D%5D%2C%22overlays%22%3A%5B%22plates%22%5D%2C%22restrictListToMap%22%3A%5B%22restrictListToMap%22%5D%2C%22search%22%3Anull%2C%22sort%22%3A%22newest%22%2C%22timezone%22%3A%22utc%22%2C%22viewModes%22%3A%5B%22list%22%2C%22map%22%2C%22settings%22%5D%2C%22event%22%3A%22uu60295377%22%7D