UPDATE: Researchers are urgently seeking public input on bizarre phenomena linked to earthquakes, as they prepare for a session at the Seismological Society of America’s annual meeting next spring. Lori Dengler, an emeritus professor of geology at Cal Poly Humboldt, emphasizes the importance of understanding these “earthquake oddities” to deepen seismic research.
Strange occurrences like earthquake lights—glowing skies and unusual bursts of light—have been reported during seismic events, raising questions about their origins. This call for stories comes after many people recalled vibrant flashes of light during the April 26, 1992 Cape Mendocino earthquakes, which included a powerful M7.2 quake followed by two significant aftershocks.
Witnesses described seeing bright blue-white flashes reminiscent of camera bulbs. These lights were often reported in remote areas devoid of electrical infrastructure, suggesting a connection to seismic activity. The phenomenon is believed to be caused by P-waves—sound waves generated by the rupture of rocks deep beneath the Earth’s surface—that can trigger electrical phenomena in the atmosphere.
In addition to lights, Dengler highlights other oddities like the visible rolling of the ground. During the 1992 quake, many outdoor observers reported waves in the ground similar to ocean swells. This phenomenon has been largely overlooked in modern seismology, despite historical accounts linking it to strong earthquakes.
Notably, the recent M7.0 Mendocino fault earthquake on October 13, 2022, occurred when many were outside, yet visual ground roll was not reported. Dengler suggests that the depth and type of faulting may influence these observations, as evidenced by similar reports during the October 17, 1989 Loma Prieta earthquake.
Sound anomalies are also on Dengler’s radar, with reports of low roars likened to trains approaching during quakes. These sounds stem from the same P-waves that can cause nausea or dizziness in nearly 20% of those who experience earthquakes, disrupting the inner ear’s balance perception.
As the research progresses, Dengler invites anyone who has experienced these phenomena—glowing skies, ground movement, unusual sounds, or even strange smells—to share their stories. These personal accounts will provide critical data for her upcoming presentation.
“It’s time to take a closer look at these phenomena that have long been dismissed,” Dengler urges, highlighting the need for shared experiences to enrich scientific understanding.
If you have experienced any of these oddities, please reach out to Lori Dengler via the email link or phone message line. Your insights could play a vital role in unraveling the mysteries of seismic events.
For further inquiries or to request a free copy of the preparedness magazine “Living on Shaky Ground,” contact Lori at 707-826-6019 or email [email protected].
