Tobias Diehl

Last Name

Diehl

First Name

Tobias

ORCID

0000-0001-6264-1506

Organisational unit

02818 - Schweiz. Erdbebendienst (SED) / Swiss Seismological Service (SED)

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Publications 1 - 10 of 59

Earthquakes in Switzerland and surrounding regions during 2012
Diehl, Tobias; Deichmann, Nicholas; Clinton, John Francis; et al. (2013)
Swiss Journal of Geosciences
SeisComp3 at the Swiss National Seismic Network
Diehl, Tobias; Clinton, John Francis; Kaestli, Philipp; et al. (2011)
Earthquakes in Switzerland and surrounding regions during 2013
Diehl, Tobias; Clinton, John Francis; Kraft, Toni; et al. (2014)
Swiss Journal of Geosciences
This report of the Swiss Seismological Service summarizes the seismic activity in Switzerland and surrounding regions during 2013. During this period, 699 earthquakes and 208 quarry blasts were detected and located in the region under consideration. With a total of 18 events with local magnitudes ML ≥ 2.5, the seismic activity in the year 2013 was slightly below the average over the previous 38 years. Most noteworthy were the two earthquake sequences of St. Gallen (SG) in July and Balzers (FL) in December. The former was induced by reservoir stimulation operations at the St. Gallen geothermal project. The maximum local magnitude in the sequence was 3.5, comparable in size with the ML 3.4 event induced by stimulation operations below Basel in 2006. The sequence of Balzers was associated with an ML 4.1 earthquake in the border region to Liechtenstein. More than 30 aftershocks with magnitudes ranging between ML −0.2 and ML 3.7 were detected in the month following the mainshock. The ML 3.5 St. Gallen and the ML 4.1 Balzers earthquakes were widely felt by the public but no reports on damages are known. The maximum intensity for both events was IV.
Seismicity at Lusi and the adjacent volcanic complex, Java, Indonesia
Obermann, Anne; Karyono, Karyono; Diehl, Tobias; et al. (2018)
Marine and Petroleum Geology
3-D seismic velocity models of the Alpine crust from local earthquake tomography
Diehl, Tobias (2008)
High-precision relocation of induced seismicity in the geothermal system below St. Gallen (Switzerland)
Diehl, Tobias; Kraft, Toni; Kissling, Eduard; et al. (2014)
Jahrestagung der Deutschen Geophysikalischen Gesellschaft ~ Tagungsband der 74. Jahrestagung der Deutschen Geophysikalischen Gesellschaft
Consistent phase picking for regional tomography models
Diehl, Tobias; Kissling, Eduard; Husen, Stephan; et al. (2009)
Geophysical Journal International
Orogen-Parallel Migration of Exhumation in the Eastern Aar Massif Revealed by Low-T Thermochronometry
Nibourel, Lukas; Rahn, Meinert; Dunkl, István; et al. (2021)
Journal of Geophysical Research: Solid Earth
New and published (U-Th)/He data on zircon, apatite, and zircon fission track ages constrain the thermal overprint and cooling history of the eastern Aar Massif, Switzerland. The timing and pattern of cooling is in agreement with independent kinematic and age constraints from exposed shear zones. This suggests that the cooling ages mainly reflect exhumation and that long-term exhumation-dynamics were mainly controlled by crustal-scale tectonic processes. Results of a statistical inverse model reveal significant diachrony in the timing of exhumation in the along-strike direction. Maximum exhumation rates ((Formula presented.) 1 mm/yr) were initially located in the central Aar Massif (from (Formula presented.) 22 to 10 Ma), then gradually migrated to the east between (Formula presented.) 10 Ma and present, while the central Aar Massif continued to exhume at slower rates ((Formula presented.) 0.5 mm/yr). The diachrony in the timing of exhumation may be explained by lateral variations in the inherited thickness or the density of the accreted European crust. We attribute the increase in exhumation rates between 2 Ma and present to enhanced glacial erosion. Nevertheless, the post 2 Ma exhumation pattern reflects a continuation of noncylindrical massif “growth” in the eastward orogen-parallel direction. This indicates that—although at slow rates—thick-skinned and buoyancy-driven compressional deformation, likely enhanced by the presence of easily erodible flysch units at the surface, might still be ongoing especially in the eastern Aar Massif. Noncylindrical massif-growth is likely to also affect other External Crystalline Massifs or orogens, but may be overlooked because studies often focus on single orogen-perpendicular transects.
Direct observations of a three million cubic meter rock-slope collapse with almost immediate initiation of ensuing debris flows
Walter, Fabian; Amann, Florian; Andrew, Kos; et al. (2020)
Geomorphology
Catastrophic collapse of large rock slopes ranks as one of the most hazardous natural phenomena in mountain landscapes. The cascade of events, from rock-slope failure, to rock avalanche and the near-immediate release of debris flows has not previously been described from direct observations. We report on the 2017, 3.0 × 10^6 m3 failure on Pizzo Cengalo in Switzerland, which led to human casualties and significant damage to infrastructure. Based on remote sensing and field investigations, we find a change in critical slope stability prior to failure for which permafrost may have played a destabilizing role. The resulting rock avalanche traveled for 3.2 km and removed over one million m3 of glacier ice and debris deposits from a previous rock avalanche in 2011. Whereas this entrainment did not lead to an unusually large runout distance, it favored debris flow activity from the 2017 rock avalanche deposits: the first debris flow occurred with a delay of 30 s followed by ten debris flows within 9.5 h and two additional events two days later, notably in the absence of rainfall. We hypothesize that entrainment and impact loading of saturated sediments explain the initial mobility of the 2017 rock avalanche deposits leading to a near-immediate initiation of debris flows. This explains why an earlier rock avalanche at the same site in 2011 was not directly followed by debris flows and underlines the importance of considering sediment saturation in a rock avalanche’s runout path for Alpine hazard assessments.
Earthquake Monitoring
Clinton, John Francis; Diehl, Tobias; Cauzzi, Carlo; et al. (2011)

Publications 1 - 10 of 59

Tobias Diehl

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