Was Monaco's Earthquake Panic Really Hysteria?

Introduction

The panic that swept Monaco during the 1887 Riviera earthquake was a response to a genuine natural disaster, not an episode of mass psychogenic illness or collective delusion. On the morning of 23 February 1887, one of the strongest earthquakes ever recorded on the French–Italian Riviera struck the region, killing hundreds of people, destroying towns to the east and west of Monaco, and triggering months of anxiety as repeated aftershocks kept residents uncertain whether an even larger shock was about to follow. Contemporary reports describe frightened crowds fleeing buildings, spending nights outdoors and reacting to persistent rumours, but these responses reflected an objectively dangerous situation rather than irrational contagion. For Monaco, the earthquake remains the clearest historical example of widespread public fear rooted in a real physical threat.

What struck Monaco and the western Riviera?

The earthquake occurred shortly after six o’clock in the morning on 23 February 1887. Modern seismological research places it among the largest earthquakes known from the Ligurian and western Mediterranean region, with an estimated intensity of IX on the MSK scale in the worst-hit areas. Damage stretched for roughly 100 kilometres along the coast between present-day France and Italy, while the shaking was felt across much of northern Italy, southern France, Switzerland and beyond.[Nature]nature.comStrong earthquakes on the French-Italian Mediterranean Riviera | Communications Earth & EnvironmentMarch 20, 2026…Published: March 20, 2026

Monaco lay close enough to the epicentral region to experience severe shaking. Although the principality escaped the catastrophic destruction seen in places such as Diano Marina and Bussana, buildings were damaged, rockfalls occurred on the steep coastal slopes, and the population experienced the same violent ground motion that affected neighbouring Menton and Nice. Contemporary scientific reports collected observations from across the Riviera, including Monaco, as researchers attempted to understand the sequence of shocks and their unusually wide effects.[Nature]nature.comThe Earthquake | NatureThe Earthquake | NatureMarch 3, 1887…Published: March 3, 1887

The earthquake did not consist of a single isolated event. Two powerful aftershocks followed the main shock on the same morning, and seismic activity continued for many months afterwards. Modern reconstructions identify roughly 200 aftershocks during the following year, explaining why fear remained high long after the initial disaster.[OUP Academic]academic.oup.comOUP AcademicReappraisal of the 1887 Ligurian earthquake (western Mediterranean) from macroseismicity, active tectonics and tsunami modell…

Flight, rumours and fear of aftershocks

The first reaction throughout the Riviera was immediate flight. People rushed from homes, hotels and public buildings into open streets or squares, often wearing only nightclothes after being awakened by the violent shaking. Newspapers from across Europe described terrified crowds, churches filling with worshippers and widespread uncertainty about whether buildings would remain standing.[paperspast.natlib.govt.nz]paperspast.natlib.govt.nzPapers Past | Newspapers | Northern Advocate | 26 February 1887 | TERRIBLE EARTHQUAKE IN EUROPE.February 26, 1887…Published: February 26, 1887

In Monaco and neighbouring Monte Carlo, the earthquake produced intense public alarm despite comparatively lighter structural damage than in some nearby Italian towns. Contemporary reports describe residents and visitors abandoning buildings and gathering outside because nobody knew whether further shocks would follow. The region’s famous hotels and casinos attracted many foreign visitors, meaning that fear spread rapidly through an unusually international population.[paperspast.natlib.govt.nz]paperspast.natlib.govt.nzPapers Past | Newspapers | Northern Advocate | 26 February 1887 | TERRIBLE EARTHQUAKE IN EUROPE.February 26, 1887…Published: February 26, 1887

The continuing aftershocks created an ideal environment for rumours. Every tremor revived fears that the disaster was beginning again. Reports circulated of fresh collapses elsewhere on the Riviera, while news from devastated Italian communities arrived slowly and often incompletely. Without modern seismological monitoring or instant communication, people could not distinguish harmless minor tremors from signs of another major earthquake.

Scientists investigating the event also noted unusual observations, including reports of dead deep-sea fish washing ashore after the earthquake. Although such phenomena attracted public attention, they were treated by researchers as natural observations requiring explanation rather than evidence of supernatural causes.[Nature]nature.comEarthquake in the Western Riviera | NatureEarthquake in the Western Riviera | NatureMay 5, 1887…Published: May 5, 1887

Was this really “mass hysteria”?

It is tempting to describe scenes of frightened crowds as “mass hysteria”, but that label is misleading.

Mass psychogenic illness usually refers to groups developing symptoms that cannot be explained by an underlying physical cause. Moral panics similarly involve exaggerated fears about social threats whose scale is unsupported by evidence. Neither description fits Monaco in February 1887.

Instead, several factors justified the population’s behaviour:

Modern earthquake science recognises that damaging aftershocks commonly follow major earthquakes, meaning that remaining outdoors immediately after a destructive event can be a rational precaution rather than a panic response. The continued seismic sequence during 1887 confirms that residents’ fears were grounded in an ongoing physical hazard.[OUP Academic]academic.oup.comOUP AcademicReappraisal of the 1887 Ligurian earthquake (western Mediterranean) from macroseismicity, active tectonics and tsunami modell…

This distinction matters because historical writing sometimes uses older expressions such as “panic” or “hysteria” loosely to describe emotional reactions. In Monaco’s case, the fear itself was real, but so was the danger.

Why Monaco’s experience matters in the history of collective fear

Within a wider study of panics and collective belief, the 1887 earthquake provides an important contrast with episodes driven mainly by rumour, superstition or imagined conspiracies.

The Monegasque population responded to:

This illustrates an important principle for historians and psychologists: not every episode of widespread fear should be interpreted as collective irrationality. Human beings often display similar outward behaviours—crowding into streets, abandoning homes, repeating rumours or seeking reassurance—whether the underlying threat is genuine or imagined. Understanding the difference requires examining the evidence for the hazard itself.

In Monaco, that evidence is overwhelming. The earthquake was one of the defining natural disasters in the history of the western Mediterranean, prompting scientific investigations, government relief efforts in the affected regions and decades of geological research into Riviera seismic hazards.[search.acs.beniculturali.it]search.acs.beniculturali.itArchivio Centrale dello StatoDirezione generale amministrazione civile. Commissione reale per i danneggiati del terremoto in Liguria, 23 febbraio 1887 1887 - 1894…

A lasting reminder of real disaster panic

The 1887 Riviera earthquake remains Monaco’s clearest documented episode of sudden collective fear. Unlike stories built around legends, miracle claims or later myths, this event is supported by abundant contemporary scientific reports, newspaper accounts and modern seismological research.

Its historical importance lies not in demonstrating mass hysteria, but in showing how ordinary people react when confronted with an immediate, life-threatening natural disaster. The fear that spread through Monaco was proportionate to the evidence available at the time: violent shaking, visible damage, reports of widespread deaths nearby and an exhausting sequence of aftershocks that kept uncertainty alive for months. The episode therefore serves as a useful reminder that collective fear is not inherently irrational; sometimes it is the expected human response to a very real danger.

Amazon book picks

Further Reading

Books and field guides related to Was Monaco's Earthquake Panic Really Hysteria?. Use these as the next step if you want deeper reading beyond the article.

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The Unthinkable

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Extraordinary Popular Delusions and the Madness of Crowds

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Rating: 4.0/5 from 5 Google Books ratings

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Browse more on Amazon:The UnthinkableExtraordinary Popular Delusions and the Madness of CrowdsThe Big Ones

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Endnotes

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Published: March 20, 2026

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Published: March 3, 1887

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Title: Earthquake in the Western Riviera | Nature
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Published: May 5, 1887

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11. Source: paperspast.natlib.govt.nz
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Additional References

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Link:https://www.cambridge.org/core/journals/the-british-journal-of-psychiatry/article/distinction-between-mental-and-physical-illness/5FA9AC9A9A8F7D6395BF41B3CD004305

Published: January 2, 2018

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