Most people will know about the terrible earthquake that devastated San Francisco on 18 April 1906, but did you know that another, much less powerful, earthquake actually hit Merthyr later that year, 115 years ago today?
At 9.45 am on 27 June 1906, a powerful earth tremor was felt across much of South Wales, its epicentre being placed just offshore of Port Talbot. The quake, which struck just a few weeks after the devastating San Francisco earthquake, was felt as far afield as Ilfracombe, Birmingham and southwest Ireland. Measuring 5.2 on the Richter Scale, the quake was caused by movement in the ‘Neath Disturbance’ and ‘Swansea Valley Disturbance’, two fault lines in the South Wales area.
Although there were no fatalities, and only minimal minor injuries sustained by falling masonry, people were terrified by the unexpected tremor.
In Swansea, there was damage to St Andrew’s Church, Swansea Prison, the Board of Trade offices and the gasworks, and the Mumbles Lighthouse was said to have ‘rocked on its foundations’. In Llanelli, the town hall clock stopped and people in Ammanford were convinced there had been a huge pit explosion, and colliers from several pits in South Wales were hurriedly brought to the service due to concerns over the stability of the mines.
The tremor hit Merthyr about five minutes after the original quake. Chimneys on two houses on the Tramroad were dislodged and crashed to the street, a similar fate befalling a house at Bryn Sion Street in Dowlais, and the plasterwork in several buildings cracked. Apart from these incidents, there were several incidents of pictures and clocks falling off walls, and crockery was smashed as it fell from shelves and tables. Yet again, however, people were terrified.
At Abermorlais School, the glass partitions between the classrooms ‘shook like leaves’, and it was only due to the calmness of the teachers in reassuring the terrified pupils that panic didn’t ensue. At Twynyrodyn and St David’s School, windows rattled and the blackboards swayed alarmingly. Yet again it was only due to the presence of mind of the teachers that panic was avoided.
A rumour quickly spread that the roof of the school at either Abercanaid or Pentrebach had collapsed injuring many of the pupils, but luckily this was not the case. At the Dowlais Gas and Coke Company, the offices were shaken with such force that the staff there feared that one of the gasometers had exploded. The staff at the Town Hall were also greatly alarmed, and they described two shocks being distinctly felt, one gentleman present remarked however, that he thought that “the Ratepayers Protection Association had commenced its work”.