Seaton Colliery explosion, 1852

On 16 June 1852 firedamp exploded at naked lights in Seaton Colliery, near Seaham Harbour, the third explosion there that year and the first to kill. All six working at the place died, the youngest a boy of ten.

Cause

Firedamp fired at the men's naked lights.

What happened

Two explosions earlier in the year had cost no lives. This one killed everyone working at the place where it happened. Men who went down at once found those nearest the shaft safe, but the afterdamp was so strong that the exploring party had to withdraw, some of them badly affected. Working the brattice forward, they found first the body of Charles Halliday; a dead horse lay with William Simpson, who was burnt, but the others were not burnt at all. Charles's brother, who was also in the pit, ran past him just after the blast and got thirty yards through the afterdamp to safety.

The dead were John Defty, 53, who left a widow and nine children; Charles Halliday, 10, shown as six in the census of the year before; John Pratt, 20; William Simpson, 27; and the brothers John and Andrew Simpson, 36 and 18, the only support of their mother, aged 86. All the bodies were brought to bank that afternoon.

Rescue & recovery

An exploring party was driven back by afterdamp and advanced the brattice to reach the bodies, all brought out the same afternoon.

Legal & regulatory aftermath

The inquest at the Mill Inn, Seaham, before the coroner T. C. Maynard and attended by the inspector Matthias Dunn, put the explosion down to naked lights.

Recorded claims

Individual factual claims, each attached to the source(s) that support it below. Where sources disagree, both are kept.

• On 16 June 1852 an explosion at Seaton Colliery, near Seaham, killed six, all of those working at the place where it happened. ^1,2
• The inquest put the explosion down to the naked lights used by the men. ¹
• Two explosions earlier that year had caused no loss of life. ¹
• The youngest dead, Charles Halliday, was ten, and possibly younger. ^1,2

Related terminology

Mining terms this disaster is structurally linked to, with the nature of the relationship.

• Afterdamp (contextual relationship)
  Named 3 times in this record, first in the narrative: “…who went down at once found those nearest the shaft safe, but the afterdamp was so strong that the exploring party had to withdraw, some of them…”
• Brattice (contextual relationship)
  Named twice in this record, first in the narrative: “…party had to withdraw, some of them badly affected. Working the brattice forward, they found first the body of Charles Halliday; a dead horse…”
• Firedamp (contextual relationship)
  Named twice in this record, first in the summary: “On 16 June 1852 firedamp exploded at naked lights in Seaton Colliery, near Seaham Harbour,…”
• Naked Light (contextual relationship)
  Named 3 times in this record, first in the summary: “On 16 June 1852 firedamp exploded at naked lights in Seaton Colliery, near Seaham Harbour, the third explosion there…”
• Pithead (contextual relationship)
  Named in this record’s narrative: “…support of their mother, aged 86. All the bodies were brought to bank that afternoon.”

Photographs & further reading

This page doesn't try to reproduce everything — these are the best original sources found for this disaster.

Sources

1. (secondary) Seaton Colliery Explosion - Seaham - 1852 — Northern Mine Research Society
2. (primary) Colliery Disaster 1852: Seaton, 16 June 1852 — Durham Mining Museum

Record created: 4 October 2026 · Last researched: 4 October 2026