2002 VOL.111 No.2
　表紙写真
2000年鳥取県西部地震による周辺横ずれ断層への剪断応カ変化と広義の余震分布

Aftershocks Triggered by Increased Shear Stress on Strike-slip Faults due to the 2000 Tottori-ken seibu Earthquake

2000年鳥取県西部地震(M7.3)では, 本震後, 震源断層沿いの余震以外にも東西にそれぞれ20km以上離れた地域(島根県東部と大山東麓)で地震活動が活発化した. 本震後最大のM5.4の地震も島根県東部で発生した.
図中のカラー表示は, 本震の震源断層運動によって周辺の鉛直横ずれ断層にかかる剪断応力の変化を示している. 暖色系で示される地域では断層がすべりやすくなり, 寒色系の地域ではすべりにくくなる.震源断層から離れた東西の地震活動は, 剪断応力が増加した地域と一致しており,本震による応力変化によってトリガーされた「広義の余震」と考えられる。
震源断層モデルは国土地理院(2001), 震央表示にはTSEIS(鶴岡, 1998), 背景の地形は国土地理院発行数値地図50mメッシュをそれぞれ用いた.赤色の実線は主な活断層を示す(活断層研究会, 1991).
(遠田晋次　Shinji　TODA)

CONTENTS 　 Japanese
Special Issue on "Correlation and Triggering Between Earthquakes and Volcanic Eruptions"
Manabu HASHIMOTO and Shinji TODA Introduction to the Special Issue on “Correlation and Triggering Between Earthquakes and Volcanic Eruptions
149-153
Sadato UEKI and Satoshi MIURA Volcanic and Seismic Activities Observed around Iwate Volcano in 1998
154-165
Takuya NISHIMURA Earthquake Triggering due to Volcanic Deformation Sources in Areas East off Ito and around the Mt. Iwate Volcano
166-174
Masaaki CHUREI elationships Between Eruptions of Volcanoes, Inland Earthquakes（M≧6.2）and Great Tectonic Earthquakes In and Around North-Eastern Japan Island Arc
175-184
Koshun YAMAOKA, Masaaki CHUREI and Masataka ANDO Inland Interplate Earthquakes Preceded the Earthquakes in Hyuga-nada, Kyushu, Japan
192-199
Takane HORI Transition from Quiet to Active Period of Seismicity Around Source Regions of Great Interplate Earthquakes
185-191
Gen AOKI and Akio YOSHIDA Statistical Characteristics of Inland Seismicity in Japan: Alternation of Active and Quiet Periods and Successiveness of Large Earthquakes
200-211
Akio YOSHIDA and Gen AOKI Seismic Quiescence in a Large Area along the Coast of the Japan Sea before Large Earthquakes
212-221
Masato KOYAMA Mechanical Coupling Between Volcanic Unrests and Large Earthquakes: A Review of Examples and Mechanisms
222-232
Shinji TODA Seismicity Rate Changes Associated with Static Stress Step and Change in Stressing Rate: A Prospect of Precise Earthquake Probabilistic Forecasting
233-247
Hiroshi KATAO Relation between Moon Phase and Occurrence of Micro-earthquakes in the Tamba Plateau
248-255
Hiroshi TSURUOKA and Masakazu OHTAKE Effects of the Earth Tide on Earthquake Occurrence: An Approach by Numerical Simulation
256-267
Kin'ya NISHIGAMI, Keiichi TADOKORO, Satoru NAGAI, Takashi MIZUNO, Yasuyuki KANO and Yoshihiro HIRAMATSU Triggering Characteristics of Induced Earthquakes: Brief Review of Water Injection Experiments in the Nojima Fault and Other Regions
268-276
Motoo UKAWA, Eisuke FUJITA and Teiji KUMAGAI Remote Triggering of Micro-earthquakes at the Iwo-jima Volcano
277-286
Yuko KASE Rupture Propagation beyond Fault Discontinuities: Effect of Depth-dependent Stress
287-297
Manabu HASHIMOTO Simulation of Seismic Activity with an Interacting Fault System Model
298-307
Toru OUCHI Generation of Large Earthquakes and an Earthquake Model that Produces Long-range Correlations
308-316
　Book Reviews
 317
　News
318
　Proceedsings
 319-320
　Announcement
 321-322
　Pictorials
1
Examples of Distribution of Coulomb Failure Stress Chang（ΔCFS）due to Volcanic Deformation Sources （Takuya NISHIMURA）