A 16-minute delay to the 10:05 p.m. train out of Exeter, England, was long blamed on a solar storm on Oct. 18, 1841. A research team led by Lancaster University now says that date was wrong and that the disruption happened on Oct. 18, 1848. The reasoning rests on a railway line: the Exeter-to-Starcross route named in the original report did not exist until 1846.
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An 1871 report with an impossible date
The 1841 date traces back to an anonymous article in Nature in 1871. It described a very intense magnetic disturbance that interfered with railway signal equipment in Exeter and held up the scheduled 10:05 p.m. departure by 16 minutes. Lancaster calls that 1871 article influential, and the 1841 date it gave went on circulating as a candidate for one of the earliest recorded cases of the Sun disrupting technology.
The clue that gave the error away is simple. The railway line named in the original account, the one between Exeter and Starcross, did not open until 1846, almost five years after the alleged 1841 incident, so no scheduled train could have been waiting on a signal there in 1841. Brett Carter, an associate professor at RMIT University and one of the study’s authors, described the work as an investigation of what had to be a typo in a Nature paper from 1871. A change of a single digit, from 1841 to 1848, is enough to move an event from before the line existed to two years after it opened, and the match between the corrected year and the geomagnetic record is what turned the suspicion into a finding.
Timetables, newspapers and magnetic records
The team, led by Professor Jim Wild of Lancaster University and including researchers from RMIT, the British Geological Survey, Natural Resources Canada, Baylor University and RAL Space, set out to test the date. They compared railway timetables and newspaper reports with solar activity records, aurora accounts and digitized geomagnetic measurements. Those records showed a strong geomagnetic disturbance on Oct. 18, 1848, along with reports of sunspots and aurora across the United Kingdom and Europe, according to Lancaster University’s news release. Neither account names the specific newspapers consulted.
The conclusion is that the 1841 date was a typographical error that an influential 1871 article carried forward. Wild said the event almost certainly happened in 1848 rather than 1841. The finding appears in the journal Space Weather, volume 24, issue 9, in a paper titled “Did Space Weather Delay the 10:05 p.m. Train Departure From Exeter on 18 October 1841?” The authors are James A. Wild, Ciaran D. Beggan, David H. Boteler, William B. Cade, Brett A. Carter and Michael Hapgood, and the paper is at DOI 10.1029/2026SW005239.
How firm the new date is
The wording of the claim is careful. Wild said the event almost certainly happened in 1848, and the paper’s own title is posed as a question about 1841 rather than as a verdict. The case rests on converging records: a line that was not yet built in 1841, newspapers and timetables from the 1840s, and a strong geomagnetic disturbance with sunspot and aurora reports on the same calendar date in 1848. Together those leave little room for the original year, though the coverage does not say that any surviving record names the 1848 train itself.
The Midland Railway case and the earlier record
Re-dating the event costs the Exeter delay its place at the front of the queue. It is no longer the earliest known case of solar activity disrupting critical infrastructure. That distinction now belongs to a March 1847 incident in which telegraph equipment on Britain’s Midland Railway suffered interference, which Lancaster describes as the earliest credible report currently known. Wild still called the Exeter episode one of the first clear examples of solar activity disrupting critical infrastructure, and a date seven years later does not change that. Carter put the larger point in historical terms: the 1840s mark the intersection between the rise of a technological age and space weather. Wild framed the lesson as one about duration, saying space weather is a long-standing natural hazard rather than a recent worry.
The best-known historical case remains the 1859 Carrington Event, when auroras were seen as far south as Hawaii and Central America. The 1848 delay is a far smaller story, one train and one signal, but it sits in the decade when railways and the telegraph first made the Sun’s behavior matter to ordinary schedules.
Mike Hapgood of RAL Space said the episode shows the importance of preserving older records. The correction depended on exactly that kind of material: timetables showing when a line opened, newspapers describing a night sky, and magnetic measurements made in the 1840s that were later digitized. A single wrong digit in a respected journal stood from 1871 until this year’s paper in Space Weather, and it took the simple question of whether the railway existed in 1841 to unravel it.
The work was also covered by RMIT University and Space.com, whose headline calls the delay a 16-minute event in 1848.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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