Takahiko Uchide
YOU?
Author Swipe
View article: Machine Learning‐Based Detection and Localization of Tectonic Tremors in the Japan Trench
Machine Learning‐Based Detection and Localization of Tectonic Tremors in the Japan Trench Open
Shallow tectonic tremors near trenches have been detected due to the advancement of offshore observation networks. Traditionally, tremors were identified by cross‐correlating envelope waveforms between seismic stations. However, this metho…
View article: Intraslab reverse faulting adjacent to the hypocenter of the 1923 Kanto earthquake: The Mw 5.0 western Kanagawa earthquake in eastern Japan on 9 August 2024
Intraslab reverse faulting adjacent to the hypocenter of the 1923 Kanto earthquake: The Mw 5.0 western Kanagawa earthquake in eastern Japan on 9 August 2024 Open
Western Kanagawa in eastern Japan is a region under complex tectonics with seismic activity. The northward subduction of Philippine Sea plate has historically caused M-8 class megathrust earthquakes, known as Kanto earthquakes. On 9 August…
View article: Fault Geometries of the 2024 Mw 7.5 Noto Peninsula Earthquake From Hypocenter‐Based Hierarchical Clustering of Point‐Cloud Normal Vectors
Fault Geometries of the 2024 Mw 7.5 Noto Peninsula Earthquake From Hypocenter‐Based Hierarchical Clustering of Point‐Cloud Normal Vectors Open
The elucidation of intricate fault geometries provides fundamental and essential information regarding seismology and other fields of solid Earth sciences. Hypocenter alignments typically reflect complex crustal fault structures, so spatia…
View article: Automated hypocenter determination of tectonic tremors in the Nankai subduction zone using convolutional neural networks combined with semblance analysis
Automated hypocenter determination of tectonic tremors in the Nankai subduction zone using convolutional neural networks combined with semblance analysis Open
Recent advances in deep learning have enhanced our ability to analyze seismic waveforms. Here, we developed and evaluated a convolutional neural network (CNN) model to classify tectonic tremors, earthquakes, and noise in seismic waveform d…
View article: Building the fracture network model for the Okuaizu geothermal field based on microseismic data analysis
Building the fracture network model for the Okuaizu geothermal field based on microseismic data analysis Open
Understanding flow behavior in a geothermal reservoir is important for managing sustainable geothermal energy extraction. Fluid flow in geothermal reservoirs generally occurs in complex existing fracture systems in which the reservoirs are…
View article: Deep crustal fluids and their relation to cutoff depths of crustal earthquakes in the North Ibaraki area of northeastern Japan inferred from reflected S-waves
Deep crustal fluids and their relation to cutoff depths of crustal earthquakes in the North Ibaraki area of northeastern Japan inferred from reflected S-waves Open
Crustal fluids play an essential role in the activity of crustal earthquakes. The north Ibaraki area in northeastern Japan has shown intense crustal seismicity after the 2011 Tohoku-oki earthquake. In this area, it is discussed that crusta…
View article: Building the Fracture Network Model for the Okuaizu Geothermal Field Based on Microseismic Data Analysis
Building the Fracture Network Model for the Okuaizu Geothermal Field Based on Microseismic Data Analysis Open
Understanding the flow behavior in a geothermal reservoir is important to manage sustainable geothermal energy extrapolation and contribute to the growth of further geothermal energy usage. Fluid flow in geothermal reservoirs generally occ…
View article: Stress Map of Japan: Detailed Nationwide Crustal Stress Field Inferred From Focal Mechanism Solutions of Numerous Microearthquakes
Stress Map of Japan: Detailed Nationwide Crustal Stress Field Inferred From Focal Mechanism Solutions of Numerous Microearthquakes Open
Crustal stress is a crucial parameter for understanding tectonics and assessing the occurrence of large earthquakes. Stress at seismogenic depths over a wide area has been inferred from focal mechanism solutions. The existence of focal mec…
View article: Construction of Crustal Stress Map in Chugoku Region, western Japan
Construction of Crustal Stress Map in Chugoku Region, western Japan Open
中国地域の地殻内応力マップを作成するため，過去12年間にわたるマグニチュード1.5以上の地震の発震機構解を決定した．気象庁一元化カタログもコンパイルし，10 kmメッシュの応力マップとして纏めた．小さな地震まで解析して発震機構解データを増やしたことで，先行研究よりも応力場の空間分解能を格段に高くすることができた．得られた応力マップから，この地域は東西圧縮の横ずれ場に卓越しているが，島根県・鳥取県の日本海側になると応力方位が時計回りに約20°回転して西北西−東南東方向を示すよ…
View article: Cascading rupture of patches of high seismic energy release controls the growth process of episodic tremor and slip events
Cascading rupture of patches of high seismic energy release controls the growth process of episodic tremor and slip events Open
Slip phenomena on plate interfaces reflect the heterogeneous physical properties of the slip plane and, thus, exhibit a wide variety of slip velocities and rupture propagation behaviors. Recent findings on slow earthquakes reveal similarit…
View article: Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock
Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock Open
A driving stress of the M w 5.8 reverse-faulting Awaji Island earthquake (2013), southwest Japan, was investigated using focal mechanism solutions of earthquakes before and after the mainshock. The seismic records from regional high-sensit…
View article: Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock
Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock Open
A driving stress of the M w 5.8 reverse-faulting Awaji Island earthquake (2013), southwest Japan, was investigated using focal mechanism solutions of earthquakes before and after the mainshock. The seismic records from regional high-sensit…
View article: Cascading Rupture of Patches of High Seismic Energy Release Controls the Growth Process of Episodic Tremor and Slip Events
Cascading Rupture of Patches of High Seismic Energy Release Controls the Growth Process of Episodic Tremor and Slip Events Open
Slip phenomena on plate interfaces reflect the heterogeneous physical properties of the slip plane and thus exhibit a wide variety of slip velocities and rupture propagation behaviors. Recent findings on slow earthquakes reveal similaritie…
View article: Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock
Driving stress and seismotectonic implications of the 2013 Mw5.8 Awaji Island earthquake, southwestern Japan, based on earthquake focal mechanisms before and after the mainshock Open
A driving stress of the M w 5.8 reverse-faulting Awaji Island earthquake (2013), southwest Japan, was investigated using focal mechanism solutions of earthquakes before and after the mainshock. The seismic records from regional high-sensit…
View article: Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning
Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning Open
SUMMARY Knowledge of crustal stress fields is essential for understanding tectonics and earthquake generation. One approach for estimating the crustal stress field is based on the focal mechanisms of earthquakes. This study investigated th…
View article: Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning
Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning Open
Earth and Space Science Open Archive This work was has been accepted for publication in Geophysical Journal International. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. …
View article: Finite Fault Inversion of Mw4.1 and its Implications for Induced Earthquake Ruptures.
Finite Fault Inversion of Mw4.1 and its Implications for Induced Earthquake Ruptures. Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geophysical Research Letters. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn mo…
View article: Driving Stress and Seismotectonic Implications of the 2013 Mw5.8 Awaji Island Earthquake, Southwestern Japan, Based on Earthquake Focal Mechanisms Before and After the Mainshock
Driving Stress and Seismotectonic Implications of the 2013 Mw5.8 Awaji Island Earthquake, Southwestern Japan, Based on Earthquake Focal Mechanisms Before and After the Mainshock Open
A driving stress of the M w 5.8 reverse-faulting Awaji Island earthquake (2013), southwest Japan, was investigated using focal mechanism solutions of earthquakes before and after the mainshock. The seismic records from regional high-sensit…
View article: Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning
Focal mechanisms of small earthquakes beneath the Japanese islands based on first-motion polarities picked using deep learning Open
Earth and Space Science Open Archive This work was has been accepted for publication in Geophysical Journal International. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. …
View article: Focal mechanisms of small earthquakes beneath the whole Japan Islands based on first-motion polarities picked using deep learning
Focal mechanisms of small earthquakes beneath the whole Japan Islands based on first-motion polarities picked using deep learning Open
Knowledge of crustal stress field is essential for understanding tectonics and earthquake generation. One way to estimate the crustal stress field is based on focal mechanisms of earthquakes. This study investigated focal mechanisms of ~ 1…
View article: Focal mechanisms of small earthquakes beneath the whole Japan Islands based on first-motion polarities picked using deep learning
Focal mechanisms of small earthquakes beneath the whole Japan Islands based on first-motion polarities picked using deep learning Open
Knowledge of crustal stress field is essential for understanding tectonics and earthquake generation. One way to estimate the crustal stress field is based on focal mechanisms of earthquakes. This study investigated focal mechanisms of ~ 1…
View article: Focal mechanisms of small earthquakes beneath the whole Japan Islands based on first-motion polarities picked using deep learning
Focal mechanisms of small earthquakes beneath the whole Japan Islands based on first-motion polarities picked using deep learning Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geophysical Research Letters. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn mo…
View article: Construction of the Crustal Stress Map in the Kanto Region, central Japan
Construction of the Crustal Stress Map in the Kanto Region, central Japan Open
関東地域の地殻応力マップを作成するため，過去14 年間にわたるマグニチュード1.5以上の地震の発震機構解を決定した．気象庁一元化カタログや我々の先行研究の結果もコンパイルし，10 kmメッシュの応力マップとして纏めた．小さな地震まで解析して発震機構解データを増やしたことで，先行研究よりも応力場の空白域が減少し，さらに応力場の空間分解能を格段に高くすることができた．得られた応力マップは非常に複雑な様相を示しており，最大水平圧縮応力方位（SHmax）が急変する場所があること，伊…
View article: Teaching Materials on Determining Epicenters Using P Wave Lateral Polarity Data for Small Earthquakes in the Hida, Japan, Region before and after the 2011 off the Pacific Coast of Tohoku Earthquake
Teaching Materials on Determining Epicenters Using P Wave Lateral Polarity Data for Small Earthquakes in the Hida, Japan, Region before and after the 2011 off the Pacific Coast of Tohoku Earthquake Open
Teaching materials on determining epicenters using P-wave lateral polarity data were produced. These materials are intended for use in secondary and advanced education and only require inexpensive tools such as a ruler and a protractor; th…
View article: Magnetar Broadband X-Ray Spectra Correlated with Magnetic Fields: Suzaku Archive of SGRs and AXPs Combined with NuSTAR, Swift, and RXTE
Magnetar Broadband X-Ray Spectra Correlated with Magnetic Fields: Suzaku Archive of SGRs and AXPs Combined with NuSTAR, Swift, and RXTE Open
The 1–70 keV persistent spectra of 15 magnetars, observed with Suzaku from 2006 to 2013, were studied as a complete sample. Combined with early NuSTAR observations of four hard X-ray emitters, nine objects showed a hard power-law emission …
View article: The 2016 Kumamoto–Oita earthquake sequence: aftershock seismicity gap and dynamic triggering in volcanic areas
The 2016 Kumamoto–Oita earthquake sequence: aftershock seismicity gap and dynamic triggering in volcanic areas Open
The 2016 Kumamoto–Oita earthquake sequence involving three large events (M w ≥ 6) in the central Kyushu Island, southwest Japan, activated seismicities in two volcanic areas with unusual and puzzling spatial gaps after the largest earthqua…