The tremor, which had a magnitude of 3.7, hit at 7.35am on Saturday, January 7, and its epicentre was 10km below the surface in the centre of a triangle between the communes of Loudéac (Côtes d'Armor), and Pontivy and Josselin (both in Morbihan).
No damage was reported. The quake was smaller than one that hit 5km below the surface near Le Drennec, Finistère, at about 10.30pm on December 11, which had a magnitude of 3.9.
That earthquake was felt as far away as Brest, where reader Charlotte Hanks said she felt it just as she was getting into bed and said she thought it was a train at first.
Quakes are quite common in Brittany, but tremors do not normally cause any damage. The region lies on a 300-million-year-old mountain range that has two faults.
Even in September 2002, when a 5.5-magnitude quake was felt throughout the region, no damage was caused - but local people said it made a loud, deep noise and caused vibrations which lasted a few seconds.
In April 2016, a 5.2-magnitude tremor struck the Charente-Maritime near Rochefort, about 25km southeast of La Rochelle
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