East Honolulu, HI Coastal Erosion Rate
Shoreline change 1.3 miles northeast of East Honolulu, HI
Good news, and an honest one: USGS's data can't distinguish this stretch, 1.3 miles northeast of East Honolulu, HI, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
The grain of this number
USGS surveys the coast in transects spaced a few hundred feet apart; this page groups the nearest ones into a single ~3.5-mile reading for the stretch closest to East Honolulu, HI, rather than showing one arbitrary line. Segment center: 21.30, -157.70. The survey behind it runs to 2007-2010, in USGS's Hawaii assessment, using the WLR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
How solid is this number
111 transects feed this segment's number; 79% of them individually measured retreat. Uncertainty on this specific number: 0.18 ft/yr either side. The unadjusted figure here, -0.13 ft/yr, would place it 603 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 2011-1009. For scale: Brigantine, NJ, 4952 miles away, ranks 1166 of 1211 nationally for growth, 2.23 ft/yr. 2 miles away, East Honolulu, HI is the nearest other measured stretch: also no significant trend.
Not this whole stretch, just East Honolulu itself: the Coastal Change Hazards Portal is USGS's own live version of this data.