For 155 years, scientists believed a solar storm delayed a train in Exeter, England, in 1841, but new research confirms the event actually occurred on October 18, 1848, after uncovering a typographical error in a 19th-century journal.
A 16-minute train delay in Exeter, England, once cited as the earliest recorded instance of a solar storm disrupting technology, has been re-dated to 1848 after researchers identified a critical error in historical records. The correction, published in the journal Space Weather, resolves a long-standing mystery and reshapes understanding of how space weather has influenced human infrastructure since the 19th century.
The Error That Changed History
The original account, published in Nature in 1871, described a very intense magnetic disturbance
on October 18, 1841, which allegedly delayed a train by 16 minutes. In this study, we effectively investigated what had to be a typo in a Nature paper from 1871,
said Professor Brett Carter of RMIT, noting the Exeter-to-Starcross line opened five years after the reported incident.
Using railway timetables, magnetic field records, and historical newspaper accounts, the team narrowed the date to October 18, 1848. This aligns with documented geomagnetic activity, including auroras observed across England and sunspot data from October 19, 1848. The revised timeline resolves the contradiction and places the incident during an important period in technological history,
said Wild, who led the study.
Archival evidence from the British Geological Survey (BGS) confirmed that the railway section connecting Exeter with Starcross opened on May 30, 1846, invalidating the 1841 date. The researchers cross-referenced railway schedules, magnetic measurements, and aurora reports to determine that the delay occurred during a period spanning March 1848 to July 1849. Historical records including a timetable supported the revised timeline.
A New Benchmark for Space Weather Research
The Exeter incident, now dated to 1848, underscores how solar activity has long posed risks to electrical systems. It’s a clear demonstration that, as soon as humans developed the first electricity-based technology, it became susceptible to disruption by large space weather events,
said Wild. The findings highlight the need to prepare for future solar cycles, as modern infrastructure—power grids, satellites, and GPS—remains vulnerable.
How the Mistake Was Uncovered
The study revealed that the Exeter-to-Starcross line opened in 1846, making the 1841 date impossible. By cross-referencing railway schedules, magnetic measurements, and aurora reports, the team pinpointed October 18, 1848, as the likely date.
Researchers examining historical railway timetables found that a 10:05 pm departure from Exeter towards Starcross was scheduled during a period spanning March 1848 to July 1849. The surviving schedules identified a window from March 1848 to July 26, 1849. A report described how the railway superintendent initially suspected tampering with instruments because they would not function properly.
Why It Matters Today
The correction shows the importance of verifying historical data, especially as space weather research informs modern preparedness. “Deepening our understanding of these events is essential for preparing for, and mitigating, the impacts of space weather—especially as we look forward to a decade of exciting space developments that will face the challenge of a new solar cycle in the 2030s,” said Hapgood.
For readers, the story serves as a reminder that even well-established historical narratives can be revised with new evidence. As Wild noted, the Exeter investigation shows why documenting that history requires both scientific observations and careful checks of historical records. The corrected date not only clarifies the past but also highlights the enduring relationship between solar activity and technological progress.
Since this line was crossed, humans have not looked back.
The findings show the importance of interdisciplinary collaboration in addressing the complex interplay between solar phenomena and human technological development.
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