The earthquake in Zeerijp could be felt in the Westerkwartier. A building sensor in Leek recorded the earthquake shock in Leek around 3:00 a.m.
The earthquake in Zeerijp had a magnitude of 3.4 on the Richter scale. This makes it the third-strongest earthquake shock to ever strike Groningen province.
Back and forth
The sensors that detected the quake are from the Groningen company Omnidots. According to owner Marko Bolt, the use of the sensors precisely indicates the extent to which the buildings shook back and forth. Bolt said that the building with the sensor in Leek moved back and forth at 0.3 mm per second. He also mentioned that the earthquake was significantly more perceptible closer to the epicenter: the sensor recorded movement of 2 mm per second in the city and movement of 3.28 mm per second in Winsum.
Seeing how much the building moves
“The difference between our sensors and those of organizations such as KNMI (Royal Netherlands Meteorological Institute) is that we measure the movement of the buildings and not the movement of the ground,” said Bolt. “So we see how far the building moves, which enables us to determine how great the risk of damage is.” According to Bolt, the chance of damage in the Westerkwartier after this earthquake was practically zero percent. “But in Winsum, it is very different,” he said. “Luckily, our office there is relatively new.”