Map Showing Early Arrival of 2017 Spring in the USA (image) US Geological Survey Share Print E-Mail Caption A new set of scientifically backed maps produced by the USGS-led USA National Phenology Network shows just how unusually early spring is arriving in the United States. 2017. (Public domain.) Credit USGS and USA National Phenology Network Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.