Shortly before four in the morning the earth shook in Upper Austria. According to ZAMG, an earthquake was measured at 3:54 a.m. in the Aschach an der Donau area in the Eferding district, northwest of Linz. The magnitude of the quake was 2.9 on the Richter scale. So it was a mild tremor and happened at a depth of only five kilometers. With this magnitude, it could be perceived by people, but no damage to buildings should have occurred.
Several people from the region who heard the tremor reported to ORF Upper Austria on Saturday morning. Michaela Würflinger from Niederwaldkirchen, for example, described that she was woken up at around 4 a.m. by a strange noise that she was initially unable to identify. Other Radio Oberösterreich listeners also spoke of noises that woke them up at around 4 a.m.
In an interview with Radio Oberösterreich, Maria-Theresia Apoloner, a seismologist at ZAMG, explains that a rumbling or a bang is typical of an earthquake. The earthquake wave would be transmitted to the surface and the air, creating these sounds that were heard in Aschach an der Donau and the surrounding area.
Two earthquakes registered
A tremor was also felt in the Neunkirchen area in Lower Austria, where the epicenter was. This earthquake was registered a few minutes after midnight and also had a magnitude of 2.9. That in Upper Austria followed almost four hours later. Anyone who felt the earthquake or even discovered damage can report their perceptions to ZAMG in the form of an earthquake report.
About 60 earthquakes are felt in Austria every year, about 600 tremors are registered by the seismographs, most of them in Tyrol and Lower Austria. According to Apoloner, in Upper Austria an earthquake is only noticed by the population about every three years. Damage to buildings only occurs every 50 years. Only from a strength of 4 room objects can move. According to the Richter scale, the first slight damage must be expected from a magnitude of 5.