Casmalia, CA Coastal Erosion Rate
Shoreline change 6.7 miles southwest of Casmalia, CA
Nothing alarming measured 6.7 miles southwest of Casmalia, CA: 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.
The grain of this number
Casmalia, CA is the nearest named place, 6.7 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: 34.78, -120.63. Survey years: 1852-2016, method LRR, from USGS's California 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 29 individual transects averaged together, 100% of which measured erosion rather than growth. The published margin on this reading runs ±0.45 ft/yr. The unadjusted figure here, -0.44 ft/yr, would place it 331 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 National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Blue Point, NY sits at national rank 1037 for growth (0.57 ft/yr), one reference point among the 1211 scored segments, 2602 miles from here. 0.9 miles up the coast, Casmalia, CA shows 0.46 ft/yr of eroding.
One address near Casmalia: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.