Overview

• On July 29, a magnitude 3.3 quake struck 15 km beneath Gouesnach in Finistère and was felt by over 161,000 residents across 37 communes.
• Less than 24 hours later on July 30, a second tremor of magnitude 2.2 occurred near Clohars-Carnoët close to the Finistère-Morbihan border.
• Both events were recorded within 10 km of the southern branch of the Armorican fault, part of the ancient Massif armoricain that underpins regional seismic activity.
• Residents reported loud booms or rumbling noises likened to storms or sonic booms despite no material damage or injuries.
• France Séisme and the Bureau central sismologique français (BCSF-Rénass) confirmed the quakes and note that the last notable regional event was a magnitude 5.4 tremor in 2002.