Mt St Helens Survey 2025 Eric Gilbertson Results: St Helens has shrunk by 0.4ft since Sept 2024. Current elevation is 8,320.7ft +/-0.1ft NGVD29 (datum summit elevations have historically been reported in). Results recognized by the peer-reviewed scientific journal Progress in Physical Geography (accepted for publication and will be online soon)… Continue reading
Half Moon Peak Survey Sept 19, 2025 Eric and Nick Results: 7992.1 ft +/-0.2ft NAVD88. Too short for WA Top 200 list by 0.7ft. Last fall I finished a project to figure out an accurate list of the 100 highest peaks in WA using a combination of Lidar data analysis… Continue reading
Julianatop, Suriname Highpoint Eric Gilbertson, Serge Massad, Viri Alvarez, Fernando, Scott Beems, Dean Veldhuizen, Sisaman (Edinho), Yepe (Guiano) Survey Results: 1256.1m +/-0.2m (orthometric height, EGM2008, 95% confidence interval) Aug 28 – depart Seattle Aug 29 – arrive Paramaribo Aug 30 – buffer day Aug 31 – Fly to Kayser, boat… Continue reading