# Wright 2017: The 22 September 1979 Vela Incident: The Detected Double-Flash > Christopher M. Wright, Lars-Erik De Geer, 2017. 9 records on Mysteries Department cite it. The modern analysis of the double flash and the meteoroid… Source: https://mysteriesdept.com/sources/SRC0CW4WMPR4HES/the-22-september-1979-vela-incident-the-detected-double Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) --- [Sources](https://mysteriesdept.com/sources)[1979 Vela incident](https://mysteriesdept.com/mysteries/vela-incident)Wright 2017 **0** # The 22 September 1979 Vela Incident: The Detected Double-Flash Christopher M. Wright, Lars-Erik De Geer, 2017. _Science & Global Security 25(3), 95–124_. Re-examines the optical signal. The second-pulse difference between the bhangmeters resembles background modulation seen in all confirmed explosions; Vela 6911 had lost the second half of its bhangmeter records for all tests from 1972 to 1978 through a memory fault, so no like-for-like comparison existed; given the satellite's geometry, meteoroid debris would mostly travel away from the sensors. Yield estimates from the flash timing are of order 1 to 2 kt. **1979 Vela incident** Articledoi: **[10.1080/08929882.2017.1394047](https://doi.org/10.1080/08929882.2017.1394047)** Checked against the original0 ## What it's used for here The modern analysis of the double flash and the meteoroid alternative. ## Cited by on this site 9 records [Vela 6911 bhangmeter records of Alert 747 (YCA and YVA traces)](https://mysteriesdept.com/mysteries/vela-incident/artifacts/ART0CW4XAE2734B/vela-6911-bhangmeter-records-of-alert-747-yca-and-yva-traces) ART [Given the satellite's geometry and solar panels, most impact debris would move away from the sensors' field…](https://mysteriesdept.com/mysteries/vela-incident/evidence/EVD0CW4X24E0K8R/given-the-satellites-geometry-and-solar-panels-most-impact) Evidence EVD [Laser calibration tests showed the bhangmeters operating nominally.](https://mysteriesdept.com/mysteries/vela-incident/evidence/EVD0CW4X33P2S9R/laser-calibration-tests-showed-the-bhangmeters-operating) Evidence EVD [The first pulses of both bhangmeters agree with each other and with earlier tests; the second-pulse…](https://mysteriesdept.com/mysteries/vela-incident/evidence/EVD0CW4WZ6P3YE9/the-first-pulses-of-both-bhangmeters-agree-with-each-other) Evidence EVD [Vela 6911 had a memory fault from 1972 to 1978 and was beyond its design life.](https://mysteriesdept.com/mysteries/vela-incident/evidence/EVD0CW4X2M27N12/vela-6911-had-a-memory-fault-from-1972-to-1978-and-was) Evidence EVD [Wright and De Geer publish a re-analysis of the double flash](https://mysteriesdept.com/mysteries/vela-incident/events/EVT0CW4WW8Y0295/wright-and-de-geer-publish-a-re-analysis-of-the-double-flash) EVT [Christopher M. Wright](https://mysteriesdept.com/mysteries/vela-incident/people/FIG0CW4WRKR53JZ/christopher-m-wright) FIG [The 1979 Vela incident](https://mysteriesdept.com/mysteries/vela-incident) The mystery article MYS [Was the signal of 22 September 1979 a nuclear explosion?](https://mysteriesdept.com/mysteries/vela-incident/questions/QST0CW4WXZM2TV0/was-the-signal-of-22-september-1979-a-nuclear-explosion) Question QST ## Cite it ``` Wright, C. M., & De Geer, L. E. (2017). The 22 September 1979 Vela Incident: The Detected Double-Flash. Science & Global Security 25(3), 95–124. https://doi.org/10.1080/08929882.2017.1394047 ``` [Read it free at scienceandglobalsecurity.org](https://scienceandglobalsecurity.org/archive/2017/11/the_22_september_1979_vela_inc.html) Key **SRC** 0CW4WMPR4HES Kind Journal article Rights The publisher's Kept 26 Oct 2026, for editors Checked Against the published article Added by [apollo](https://mysteriesdept.com/u/apollo) The record Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS. [CSL-JSON](https://mysteriesdept.com/sources/SRC0CW4WMPR4HES/the-22-september-1979-vela-incident-the-detected-double/csl.json)