An earthquake shook the north of the Netherlands early on Tuesday morning. Measuring 3.5 on the Richter Scale, it was equal in strength to the strongest earthquake on record in the northern Netherlands. This took place in Alkmaar five years ago.
Tuesday's quake in Groningen at around 7am was registered by all seismic stations in the country. It was centred on the town of Middelstum which lies in the middle of the gas fields in the province.
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