Temporal and spatial correlations of the strain field in tectonic active region, southern Kyusyu, Japan

Harada, Masatake; Furuzawa, Tamotsu; Teraishi, Masahiro; Ohya, Fumio

doi:10.1016/s0264-3707(03)00008-5

Cited by 16 publications

(27 citation statements)

References 9 publications

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“…The displacement of seismicity in the annual cycles occurs from east to west and coincides with the direction of migration of large earthquakes, strain wave fronts and crustal deformation detected from direct deformographic and GPS measurements (Kasahara, 1979;Bella et al, 1990;Harada et al, 2003;Yoshioka et al, 2015). The slow strain wave fronts are triggers of large earthquakes (M > 6) in the submeridional faults of the Amurian plate.…”

Section: Discussionsupporting

confidence: 67%

“…The direct methods exploring temporal variations of crustal deformation comprise the deformographic (Kasahara, 1979;Ishii et al, 1983;Nevskii et al, 1987;Bella et al, 1990;Harada et al, 2003), hydrogeodynamic (Barabanov et al, 1988;Kissin, 2008) and geodetic measurements (Kuz'min, 2012), including the methods of deformation measurements using laser ranging (Milyukov et al, 2013) and GPS observations (Reuveni et al, 2014;Yoshioka et al, 2015).…”

Section: Methods For Detection Of Slow Strain Wavesmentioning

confidence: 99%

“…By now, the deformographic, geodetic and hydrological measurements performed worldwide have revealed the migration of deformations at velocities of about 10-100 km yr −1 and 1-10 km day −1 (Kasahara, 1979;Bella et al, 1990;Harada et al, 2003;Kuz'min, 2012;Reuveni et al, 2014;Yoshioka et al, 2015). Migration of earthquake epicenters coincides with the velocity (10-100 km yr −1 ) and direction of crustal deformation movement (Kasahara, 1979;Barabanov et al, 1988) and with hydrological effects (Kissin, 2008).…”

Section: Introductionmentioning

confidence: 98%

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Slow strain waves in blocky geological media from GPS and seismological observations on the Amurian plate

Быков

Trofimenko

2016

Nonlin. Processes Geophys.

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Abstract. Based on the statistical analysis of spatiotemporal distribution of earthquake epicenters and perennial geodetic observation series, new evidence is obtained for the existence of slow strain waves in the Earth. The results of our investigation allow us to identify the dynamics of seismicity along the northern boundary of the Amurian plate as a wave process. Migration of epicenters of weak earthquakes (2 ≤ M ≤ 4) is initiated by the east-west propagation of a strain wave front at an average velocity of 1000 km yr −1 . We have found a synchronous quasi-periodic variation of seismicity in equally spaced clusters with spatial periods of 3.5 and 7.26 • comparable with the length of slow strain waves. The geodetic observations at GPS sites in proximity to local active faults show that in a number of cases, the GPS site coordinate seasonal variations exhibit a significant phase shift, whereas the time series of these GPS sites differ significantly from a sinusoid. Based on experimental observation data and the developed model of crustal block movement, we have shown that there is one possible interpretation for this fact that the trajectory of GPS station position disturbance is induced by migration of crustal deformation in the form of slow waves.

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Section: Discussionsupporting

confidence: 67%

Section: Methods For Detection Of Slow Strain Wavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Slow strain waves in blocky geological media from GPS and seismological observations on the Amurian plate

Быков

Trofimenko

2016

Nonlin. Processes Geophys.

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“…We have observed crustal strains in vaults at Isa Observatory (ISA; location: 32 • 00 14.4 N, 130 • 43 31.44 E; Fig. 1b), using extensometers composed of 30-m lengths of super-invar rods installed in tunnels in three independent horizontal directions: E1(N37 • W), E2(N53 • E), and E3(N82 • W) (Takada et al, 1987;Harada et al, 2003). Because of its proximity to Shinmoe-dake (within ∼18 km), strain data from ISA are expected to provide timely monitoring of the effects of the Tohoku-oki earthquake on crustal strain in the region, and of potential impacts on activity at Shinmoe-dake.…”

Section: Introductionmentioning

confidence: 99%

On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults

Yamazaki

Teraishi

Komatsu

et al. 2011

Nat. Hazards Earth Syst. Sci.

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Abstract. The Shinmoe-dake volcano in southwest Japan, which produced its first major eruption in 52 yr on 26 January 2011 but had been quiescent since 1 March, re-erupted on 13 March. It was only two days after the occurrence of the M = 9.0 Tohoku-oki earthquake in eastern Japan. The coincidence of the two events raises the question of whether the earthquake triggered the volcanic activity. As a provisional but rapid assessment of this question, we examined highresolution strain data at a site located 18 km from Shinmoedake. In terms of the Tohoku-oki earthquake, three points can be drawn from the strain data: (1) static strain changes were less than 0.05 × 10 −6 , which is too small to trigger an eruption; (2) the amplitudes of dynamic strain changes are on the order of 10 −6 , which may trigger seismicity or volcanic eruption; and (3) strain rates were not accelerated, which indicates no significant change in magma pressure. Comparing these results with reports of other eruptions coincident with seismic events, and considering a scenario in which a seismic event triggered an eruption, we tentatively conclude that the eruption on 13 March was not a triggered event. However, this conclusion may be revised after analyzing seismic data.

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“…Based on the spatial cycles with the phase shift of the maximum seismic activity values at the rate of 1000 km per year, it is possible to represent the dynamics of seismicity in the form of a process initiated by long-period stress waves/deformations. According to [Mogi, 1968;Kasahara, 1979;Malamud, Nikolaevskii, 1989;Saprygin et al, 1997;Harada et al, 2003;Bykov, 2005Bykov, , 2014Sherman, 2007Sherman, , 2013Sherman, , 2014Milyukov et al, 2013], slow deformation waves of the global and regional scale are generated at the margins of lithospheric plates. Under this concept, the migration rate of seismic activity and the spatial extent of seismic cycles can be identified as the velocity and length of deformation waves.…”

mentioning

confidence: 99%

Slow Deformation Waves in the Seismic Regime and Geophysical Fields at the Northern Margin of the Amur Plate

Trofimenko¹,

Быков

Grib³

2018

Geodin. tektonofiz.

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Abstract:The interaction between the Amur, Pacific and Eurasian tectonic plates initiates seismic activity at the plate margins as well as in the plate periphery, as evidenced by intracontinental earthquakes. In the Amur plate, the dynamics of intercontinental seismicity is controlled by deformation wave fronts comprising a regular pattern of equidistant zones [Sherman, 2013]. According to [Trofimenko et al., 2015a[Trofimenko et al., , 2015b, maximum values of seismic activity in the range of magnitudes 2≤M≤4 also form a sequence of spatial cells in the form of seismic clusters from the east (Sakhalin -Sakh) to the west (the western boundary of the Baikal rift zone -BRZ ) (Fig. 1). One of the main characteristics of the seismic process is seismic activity migration given as sequential activation of seismogenic structures within the seismically active zones and on the global scale [Vikulin et al., 2012;Khain, Khalilov, 2008]. Direct observations show that crust deformation migrates from the Japan-Kuril-Kamchatka subduction zone towards the continent, and the estimated migration rates range from 10 to 140 km per year (e.g. [Ishii et al., 1978;Kasahara, 1979;Harada et al., 2003;Yoshioka et al., 2015]). In the Baikal and Amur regions (107-140°E), the fronts of deformation waves migrate at a rate of 5-20 km per year [Sherman, 2007[Sherman, , 2013. Considering the order of magnitude, this rate is comparable to the rates of crust deformation migration from the Japan-Kuril-Kamchatka zone (10-100 km per year). Our studies show that the sequential activation of the seismic clusters in the northeastern segment of the Amur plate (Sakh -TanLu -Al-St) occurs at a rate of 1000 km per year [Trofimenko et al., 2015a] (Fig. 1). In the meridional tectonic structures, the shifting chains of maximum seismicity values are sequentially replaced by minimum values (i.e. inversion zones). Based on the spatial cycles with the phase shift of the maximum seismic activity values at the rate of 1000 km per year, it is possible to represent the dynamics of seismicity in the form of a process initiated by long-period stress waves/deformations. According to [Mogi, 1968;Kasahara, 1979;Malamud, Nikolaevskii, 1989;Saprygin et al., 1997;Harada et al., 2003;Bykov, 2005Bykov, , 2014Sherman, 2007Sherman, , 2013Sherman, , 2014Milyukov et al., 2013], slow deformation waves of the global and regional scale are generated at the margins of lithospheric plates. Under this concept, the migration rate of seismic activity and the spatial extent of seismic cycles can be identified as the velocity and length of deformation waves. Using the data on seismicity of the most active region of the Baikal rift zone -the northwestern segment of the Amur plate, we have studied the periodic components of seismicity along the entire northern boundary of the Amur plate. An indirect evidence of the existence of deformation waves is the migration of anomalies of geophysical fields and its correlation with the migration of seismic activity. The space-time anomalies of the magnet...

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Temporal and spatial correlations of the strain field in tectonic active region, southern Kyusyu, Japan

Cited by 16 publications

References 9 publications

Slow strain waves in blocky geological media from GPS and seismological observations on the Amurian plate

Slow strain waves in blocky geological media from GPS and seismological observations on the Amurian plate

On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults

Slow Deformation Waves in the Seismic Regime and Geophysical Fields at the Northern Margin of the Amur Plate

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