Hampton, NH Coastal Erosion Rate
Is the coast eroding 1.5 miles east of Hampton, NH?
Nothing alarming measured 1.5 miles east of Hampton, NH: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
What this reading actually covers
Hampton, NH is the nearest named place, 1.5 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 42.94, -70.80. Survey years: 2007-2009, method LRR, from USGS's New England / Mid-Atlantic shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
How solid is this number
This reading comes from 84 individual transects averaged together, 74% of which measured erosion rather than growth. The published margin on this reading runs ±0.23 ft/yr. The unadjusted figure here, -0.15 ft/yr, would place it 564 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS Open-File Report 2010-1119. Rank 1135 nationally for growth belongs to Long Beach, CA, 2608 miles from this stretch, measured at 1.31 ft/yr. Hampton, NH, 2.3 miles off, is the adjacent measured stretch, reading slight erosion at 0.24 ft/yr.
Hampton, NH on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.