Magnitude complexity of earthquake sequences resulting from anthropogenic activities
| Autor: | Kostoglou, A., Orlecka-Sikora, B., Lasocki, S. |
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| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-0572 |
| Popis: | Human activities exploiting geo-resources can cause moderate to strong earthquakes and result in significant economic and social impacts. It was shown (Urban et al. Pure Appl. Geophys. 173, 2016) that because such anthropogenic seismicity was controlled by complex technological factors, its magnitude distribution might deviate from the exponential distribution of the Gutenberg–Richter (G-R) law. Here, we investigated the deviation of the magnitude distributions from the G–R law for twelve earthquake sequences of anthropogenic seismicity, accessible on the “EPISODES” platform of EPOS Thematic Core Service Anthropogenic Hazards (https://tcs.ah-epos.eu/). The sequences include earthquakes induced by reservoir impoundment and hydraulic injection, as well as acoustic emissions induced by repetitive cooling cycles. We examined the magnitude distributions of space–time clusters of seismicity following variations of the inducing processes, ensuring the stationarity of the seismic process by appropriate temporal window selection. Subsequently, we assessed the deviation from the G–R law via the Anderson – Darling test.The results showed that the magnitude distribution of anthropogenic seismicity deviated from exponentiality regardless of the causative technological factors. They point to the need to consider alternative magnitude distribution models when calculating seismic hazard parameters, as incorrect models can impose unacceptable errors on hazard estimates. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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