East Honolulu, HI Coastal Erosion Rate
Is the coast eroding 3.5 miles west of East Honolulu, HI?
The coast 3.5 miles west of East Honolulu, HI shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What "East Honolulu" means on this page
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest East Honolulu, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 21.27°N, 157.77°W. Survey years: 2007-2010, method WLR, from USGS's Hawaii 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.
What backs this reading up
This reading comes from 39 individual transects averaged together, 10% of which measured erosion rather than growth. Uncertainty on this specific number: 0.13 ft/yr either side. Taken at face value, this segment's raw 0.07 ft/yr reading would land it 830 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2011-1009. For scale: Orick, CA, 2401 miles away, ranks 1130 of 1211 nationally for growth, 1.26 ft/yr. 1.7 miles away, East Honolulu, HI is the nearest other measured stretch: also no significant trend.
One address near East Honolulu: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.