A swarm of moderate earthquakes struck overnight with two magnitude 5.7 and one magnitude 5.5 centered approximately 30 miles north-northeast of Lee Vining, just inside the Nevada border. No damage was reported, but most residents were awakened by a moderate rocking motion lasting less than 30 seconds. The temblors were felt from Hawthorne, Nevada and across the Central Sierra and Central Valley. Minor earthquake activity continues in the region, including a small earthquake along the southeast shore of Mono Lake. The Mono Basin and Eastern Sierra are geologically active, and there is always concern and speculation with future volcanic activity. Earthquake swarms like this have occurred in the past near Long Valley and Mammoth Lakes, and thus far all have faded into geologic history.