Hessdalen Scientific Campaign: 188 Observations in 5 Weeks
From January 21 through February 26, 1984, Project Hessdalen conducts its intensive scientific observation campaign in central Norway. Armed with radar, cameras, Geiger counters, seismograph, fluxgate magnetometer, spectrum analyzer, and infrared viewers, the team records 188 specific observations. Of these, 53 are of sufficient quality to be considered valid 'Hessdalen Phenomena.' Three types categorized: (1) white/blue-white flashing lights high in air, (2) yellow lights with red on top, sometimes flashing, (3) most commonly, slow-moving roundish yellow/white lights that can hover for an hour or more. Radar and camera evidence obtained but not with seismographs, Geiger counters, or IR viewers — suggesting geological activity and radioactivity are not involved. Objects appear 'not merely intelligent, but mischievous' — cameras failed 'mostly when we needed them most.'
Background
From 21 January to 26 February 1984, Project Hessdalen conducted an observing campaign in Hessdalen, Norway. Project materials report 188 observations, with only some judged sufficiently documented for the project’s purposes. Instruments included, among others, radar, cameras, magnetometers and spectroscopy. The figure of 188 refers to observations, not to 188 confirmed artificial spacecraft. Hessdalen remains a set of recurring, sometimes instrumentally recorded luminous and aerial phenomena; the measurements do not establish a specific origin.