Mass strandings of whales have often been documented, but their causes remain unclear.
Researchers from Europe have just published a study in the International Journal of Astrobiology suggesting that some strandings are triggered by strong geomagnetic storms such as the one headed for Earth now. On Sept. 4th, active sunspot AR2673 hurled a CME toward Earth.
Estimated time of arrival: Today. According to NOAA forecasters, the CME’s impact will spark moderately-strong G2-class geomagnetic storms with isolated periods of strong G3-class storming on Sept. 6th and 7th.
Whales’ magnetic sense can play an important role in migration, and this sense may become confused when CMEs rattle our planet’s magnetic field.
Read the original research (open access) from Cambridge University Press.
Solar storms may trigger sperm whale strandings: explanation approaches for multiple strandings in the North Sea in 2016
Abstract: The Earth’s atmosphere and the Earth’s magnetic field protects local life by shielding us against Solar particle flows, just like the sun’s magnetic field deflects cosmic particle radiation. Generally, magnetic fields can affect terrestrial life such as migrating animals. Thus, terrestrial life is connected to astronomical interrelations between different magnetic fields, particle flows and radiation. Mass strandings of whales have often been documented, but their causes and underlying mechanisms remain unclear. We investigated the possible reasons for this phenomenon based on a series of strandings of 29 male, mostly bachelor, sperm whales (Physeter macrocephalus) in the southern North Sea in early 2016. Whales’ magnetic sense may play an important role in orientation and migration, and strandings may thus be triggered by geomagnetic storms.
This approach is supported by the following: (1) disruptions of the Earth’s magnetic field by Solar storms can last about 1 day and lead to short-term magnetic latitude changes corresponding to shifts of up to 460 km; (2) many of these disruptions are of a similar magnitude to more permanent geomagnetic anomalies; (3) geomagnetic anomalies in the area north of the North Sea are 50–150 km in diameter; and (4) sperm whales swim about 100 km day−1 , and may thus be unable to distinguish between these phenomena. Sperm whales spend their early, non-breeding years in lower latitudes, where magnetic disruptions by the sun are weak and thus lack experience of this phenomenon. ‘Naïve’ whales may therefore become disoriented in the southern Norwegian Sea as a result of failing to adopt alternative navigation systems in time and becoming stranded in the shallow North Sea.
h/t NASA spaceweather.com