Effects of strong seismic shaking in lake sediments, and earthquake recurrence interval, Témiscaming, Quebec

1991 ◽  
Vol 28 (9) ◽  
pp. 1349-1352 ◽  
Author(s):  
Ronald Doig
Keyword(s):  
Relative Frequency ◽  
Sediment Cores ◽  
Recurrence Interval ◽  
Small Lakes ◽  
Earthquake Recurrence ◽  
Uppermost Layer ◽  
Earthquake Recurrence Interval ◽  
A Minor ◽  
Epicentral Region ◽  
Silt Layer

The magnitude 6.3 Timiskaming earthquake of 1935 resulted in discoloration in small lakes in the epicentral region. Sonar profiles for Lac Tee have shown that organic-rich gyttja has been removed from the sides and redeposited in the deep parts of the lake. Lake sediment cores from deep basins contain a 2–3 cm uppermost layer, which is interpreted as the normal accumulation of sediment since 1935. This is followed by a 20 cm chaotic zone of black gyttja mixed with partly tabular fragments of a previously formed silt layer, underlain by a dense 1–2 cm thick silt horizon. The latter is interpreted as having formed by rapid settling of the denser silicate portion of the resuspended sediment. This 20 cm zone is insufficient to account for the abnormal thickness of gyttja in the basins, so events of this kind would have had to have occurred repeatedly since deglaciation. The only major prehistoric event revealed by these ~100 cm cores is at a depth equivalent to about 1500 years ago, based on the amount of sediment deposited since 1935. A minor silting event occurred about 400 years ago. On this basis, the recurrence interval of magnitude 6 or greater earthquakes is longer at Témiscaming than at Charlevoix, Quebec (75 years historically), consistent with the present relative frequency of small earthquakes in these two regions.

Seismites as an indicator for determination of earthquake recurrence interval: A case study from Erciş Fault (Eastern Anatolia-Turkey)

2019 ◽  
Vol 766 ◽  
pp. 167-178 ◽  
Author(s):  
Serkan Üner ◽  
Erman Özsayın ◽  
Azad Sağlam Selçuk
Keyword(s):  
Recurrence Interval ◽  
Eastern Anatolia ◽  
Earthquake Recurrence ◽  
Earthquake Recurrence Interval

Determining the Slip Rate and Earthquake Recurrence Interval on the Tip of a Foreberg in the Gobi-Altai, Mongolia

2021 ◽  
Author(s):  
C.H. Lee ◽  
Y.B. Seong ◽  
J.-S. Oh
Keyword(s):  
Surface Deformation ◽  
Slip Rate ◽  
Alluvial Fan ◽  
Recurrence Interval ◽  
Luminescence Dating ◽  
High Mountain ◽  
Earthquake Recurrence ◽  
Mountain Ranges ◽  
Earthquake Recurrence Interval ◽  
Exposure Ages

Abstract ––The Gobi-Altai, Mongolia, includes high mountain ranges that have accommodated the compressional stresses derived from the collision between the Eurasian and Indian Plates. The Gurvan Bogd, which is one of the main mountain ranges in the Gobi-Altai, is a restraining bend along the Bogd sinistral fault. Although surface ruptures did not form near the Artz Bogd during the Mw = 8.1 Gobi-Altai earthquake of 1957, it is still active, as evidenced by a growing topography (i.e., forebergs). Six foreberg ridges have formed in the foreland of the Artz Bogd, which are considered to be the result of surface deformation of alluvial fans due to thrusting. One stream has cut down to expose a foreberg tip, providing the opportunity to explore the slip evolution of the region. Here we map a growing fault structure related to blind thrusting. We identify five faulting events from an analysis of the outcrop and apply optically stimulated luminescence dating to the faulted sedimentary layers, yielding an average slip rate of 0.045 ± 0.007 m/kyr and an earthquake recurrence interval of 5.8 ± 0.5 kyr over the last ~32 kyr. Furthermore, the long-term (~600 kyr) uplift rate of the foreberg is 0.067 ± 0.007 m/kyr, as deduced by dividing the vertical displacement of the alluvial fan surface by the 10Be surface exposure ages of boulders on the fan. The discrepancy (20–30%) between these two deformation rates may be due to the different timescales they cover and an along-strike gradient in slip rate.

The slip rate and strong earthquake recurrence interval on the Qianning-Kangding segment of the Xianshuihe fault zone

2001 ◽  
Vol 14 (3) ◽  
pp. 263-273 ◽  
Author(s):  
Rong-jun Zhou ◽  
Yu-lin He ◽  
Zu-zhi Huang ◽  
Xiao-gang Li ◽  
Tao Yang
Keyword(s):  
Fault Zone ◽  
Strong Earthquake ◽  
Slip Rate ◽  
Recurrence Interval ◽  
Earthquake Recurrence ◽  
Earthquake Recurrence Interval ◽  
Xianshuihe Fault Zone ◽  
Strong Earthquake Recurrence

scholarly journals Paleo-earthquake Evidence and Earthquake Recurrence for Düzce Fault, Turkey

2021 ◽  
Author(s):  
Tolga Komut ◽  
Ersin Karabudak
Keyword(s):  
Probability Distribution ◽  
Probability Distributions ◽  
Slip Rate ◽  
Recurrence Interval ◽  
Historical Earthquake ◽  
Earthquake Recurrence ◽  
Probability Curve ◽  
Recurrence Model ◽  
Sequential Event ◽  
Earthquake Recurrence Interval

Abstract Paleoseismological trenching was performed along the Düzce fault providing some preliminary insight about its seismogenic behavior. Dating was based on radiocarbon analysis of peat samples collected from the trenches and suggested seven earthquakes have occurred since 1740 BC. Integrating date constraints of events exposed in the trenches suggests a periodical earthquake recurrence model. According to a linear sequential event serial that has minimum misfit determined by considering the probability curve limits of the sample dates, the earthquake recurrence interval is between 384 and 460 years (or possibly between AD 394 and 400). A probability curve was also calculated for the date of the last earthquake (1999 Düzce earthquake) considering the probability distributions of sample dates based on the same event serial. This probability-distribution-based method, similarly, predicted that the 1999 Düzce earthquake occurred between 1933–2005 (± 36 years) with a 68 % probability. After this verification. Using this method, it was estimated that the next earthquake along the Düzce fault has a 68 % probability of occurring between 2328–2392. According to this calculation, the earthquake recurrence interval is about 391 ± 34 years with a 68 % probability and the AD 967 historical earthquake likely ruptured the Düzce fault. Assuming an average slip of 350 cm (the average slip of the 1999 earthquake), the slip rate was estimated to be between 8.7–11.2 mm/a.

The Toba Volcanic Event and Interstadial/Stadial Climates at the Marine Isotopic Stage 5 to 4 Transition in the Northern Indian Ocean

2002 ◽  
Vol 57 (1) ◽  
pp. 22-31 ◽  
Author(s):  
Hartmut Schulz ◽  
Kay-Christian Emeis ◽  
Helmut Erlenkeuser ◽  
Ulrich von Rad ◽  
Christian Rolf
Keyword(s):  
Arabian Sea ◽  
Water Productivity ◽  
Ice Core ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Sediment Supply ◽  
Volcanic Event ◽  
Additional Support ◽  
Marine Isotope Stage 5 ◽  
A Minor

AbstractThe Toba volcanic event, one of the largest eruptions during the Quaternary, is documented in marine sediment cores from the northeastern Arabian Sea. On the crest of the Murray Ridge and along the western Indian continental margin, we detected distinct concentration spikes and ash layers of rhyolithic volcanic shards near the marine isotope stage 5–4 boundary with the chemical composition of the “Youngest Toba Tuff.” Time series of the Uk′37-alkenone index, planktic foraminiferal species, magnetic susceptibility, and sediment accumulation rates from this interval show that the Toba event occurred between two warm periods lasting a few millennia. Using Toba as an instantaneous stratigraphic marker for correlation between the marine- and ice-core chronostratigraphies, these two Arabian Sea climatic events correspond to Greenland interstadials 20 and 19, respectively. Our data sets thus depict substantial interstadial/stadial fluctuations in sea-surface temperature and surface-water productivity. We show that variable terrigenous (eolian) sediment supply played a crucial role in transferring and preserving the productivity signal in the sediment record. Within the provided stratigraphic resolution of several decades to centennials, none of these proxies shows a particular impact of the Toba eruption. However, our results are additional support that Toba, despite its exceptional magnitude, had only a minor impact on the evolution of low-latitude monsoonal climate on centennial to millennial time scales.

Sign in / Sign up

Export Citation Format

Share Document