８－２　近畿・四国地方の地殻変動

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へいぞうこけい
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1 Crustal Movements in Kinki and Shikoku Districts Geographical Survey Institute BM BM GEONET

2 GEONET ) ) ) ) ) ) ) ) )

3 1 Fig.1 Results of Precise Leveling around Osaka city 2 Fig.2 Result of Precise Leveling survey along the south-western coast of Kii Peninsula (from Kami- Tonda town to Kushimoto town)

4 Fig.3 Time series of height change of bench marks along the leveling route on the south-west coast of Kii Peninsula from BM (Shirahama) to F41 (Kushimoto) referred to BM9189 (Shirahama) km Fig.4 Time series of height change of bench marks along the leveling route on the coast of Kii Peninsula from BM4738 (Ise) to 921 (Susami) referred to BM4772 (Kaizan) - 4 -

5 5 Fig.5 The difference of Monthly Mean Tide Level, between Tidal stations around Kii Peninsula - 5 -

6 6a Fig.6a Results of Precise Leveling around Muroto Peninsula (from Aki city to Shishikui town via Muroto city)

7 6b Fig.6b Results of Precise Leveling around Muroto Peninsula (from Tano town to Toyo town)

8 Fig.7 Time series of height change of bench marks along the leveling route on the coast of Muroto Peninsula from BM5163 (Aki) to via BM5141 (Muroto) to BM5121 (Toyo) referred to BM51 63 (Aki)

9 8 Fig.8 The difference of Monthly Mean Tide Level, between Tidal stations around Shikoku

10 9 GEONETGPS Fig.9 Long term time series of GEONET F2 solution results of continuous GPS measurements around Muroto Peninsula (Baseline map and records of site maintenance)

11 1,11 GEONETGPS Fig.1, 11 Long term time series of GEONET F2 solution results of continuous GPS measurements around Muroto Peninsula (with the correction removing linear trend and one year cycle and half year cycle components referred to Tokushima

12 成分変化グラフ成分変化グラフ期間 16/4/1 26/4/29 JST (m) (9) 徳島(95416) 高知北川(2153) 期間 16/4/1 26/4/29 JST 東西基準値 m (m) (1) 徳島(95416) 室戸２(2155) 東西基準値 m GEONETGPS '/1/1'98/1/1 '/1/1'/1/1'1/1/1'2/1/1 '3/1/1'4/1/1'5/1/1'6/1/1 '/1/1'98/1/1 '/1/1'/1/1'1/1/1'2/1/1 '3/1/1'4/1/1'5/1/1'6/1/1 Fig.9 Long term time series of GEONET F2 solution results of continuous GPS measurements (m) (9) 徳島(95416) 高知北川(2153) 南北基準値 m (m) (1) 徳島(95416) 室戸２(2155) 南北基準値 m around Muroto Peninsula (Baseline map and records of site maintenance) ,11 GEONETGPS '/1/1'98/1/1 '/1/1'/1/1'1/1/1'2/1/1 '3/1/1'4/1/1'5/1/1'6/1/1 '/1/1'98/1/1 '/1/1'/1/1'1/1/1'2/1/1 '3/1/1'4/1/1'5/1/1'6/1/1 (m) (9) 徳島(95416) 高知北川(2153) 比高基準値 m.8 Fig.1, 11 (m) (1) 徳島(95416) 室戸２(2155) 比高基準値 7.42m Long term time series of GEONET F2 solution results of continuous GPS measurements around Muroto Peninsula (with the correction removing linear trend and one year cycle and half year cycle components referred to Tokushima '/1/1'98/1/1 '/1/1'/1/1'1/1/1'2/1/1 '3/1/1'4/1/1'5/1/1'6/1/1 '/1/1'98/1/1 '/1/1'/1/1'1/1/1'2/1/1 '3/1/1'4/1/1'5/1/1'6/1/1 ---[F2:最終解] 国土地理院 12 GEONETGPS Fig.12 Long term time series of GEONET F2 solution results of continuous GPS measurements around Muroto Peninsula (without the correction removing linear trend and one year cycle and half year cycle components referred to Tokushima 13 GEONET Fig.13 Mean crustal movement velocity in Shikoku district by GEONET observation (left, horizontal / right, vertical) 14 GEONET 9 Fig.14GEONETGPS Crustal movement in Shikoku district by GEONET observation before and after the Earthquake of South-east off Kii Peninsula (upper, before the earthquake / lower, after Fig.9 Long term time series of GEONET F2 solution the earthquake) (left, horizontal / right, vertical)results of continuous GPS measurements around Muroto Peninsula (Baseline map and records of site maintenance). 15 1,11 Fig.15 Crustal GEONETGPS movement velocity change at Tosa-Shimizu and Muroto GEONET sites Fig.1, 11 Long term time series of GEONET F2 solution results of continuous GPS 16 measurements around at Muroto Peninsulasites (with correction removing Fig.16 Comparison of height change the GEONET andthelevelling bench marks linear around trend and one year cycle and half year cycle components referred to Tokushima Muroto peninsula. 12 GEONETGPS 17 Fig.17 Results of repeated precise measurements of distance of baseline cluster at Awa-Ikeda cluster, Fig.12 Long timepart series of GEONET F2 solution results of continuous GPS measurements in theterm middle of Shikoku around Muroto Peninsula (without the correction removing linear trend and one year cycle and half year cycle components referred to Tokushima 13 GEONET Fig.13 Mean crustal movement velocity in Shikoku district by GEONET observation (left, horizontal / right, vertical) GEONET Fig.14 Crustal movement in Shikoku district by GEONET observation before and after the

13 基線ベクトル成分の変位量と変化率室戸地方の水平上下変動図傾斜年周半年周補正三隅トレンド推定期間 18/4/1-2/1/1 東西成分変位量使用データ最終日 26/5/ 室戸変位量[m] 変位量[m] 東西成分変位量使用データ最終日 26/5/15 上下変動三隅室戸 9482 三隅土佐清水 9485 基準期間 23/8/1 23/8/3 比較期間 24/8/1 24/8/3 水平変動スローイベントスローイベント東西成分変化率プロット最終日 26/ Linear Trend : 18/4/1-23/4/ 変化率[m/yr] 変化率[m/yr] 水平変化率 /4/15 26/1/15 DN[m/yr].2 26/4/ pink 破線全期間 red 太線最近３ヶ月間 -.5 : Linear Trend 18/4/1-23/4/1 平均日数 : 6日間.4 26/1/ : Linear Trend 18/4/1-23/4/1 平均日数 : 6日間日間のデータを１日ずつずらして計算プロットの位置は計算に用いた期間の中間水平変化率 DN[m/yr] 日間のデータを１日ずつずらして計算プロットの位置は計算に用いた期間の中間 DE[m/yr] 第 14 図 GEONET 観測による紀伊半島南東沖地震前後の四国地方の地殻変動左水平右上下 Fig.14 Crustal movement in Shikoku district by GEONET observation before and after the Earthquake of South-east off Kii Peninsula (upper, before the earthquake / lower, after the earthquake) (left, horizontal / right, vertical) 5 Linear Trend : 18/4/1-23/4/1.4 固定局三隅９５０３８８国土地理院 [F2 最終解] 3.1 Linear Trend : 18/4/1-23/4/ 南北成分変化率プロット最終日 26/4/ 南北成分変化率プロット最終日 26/ 固定局三隅９５０３８８南北成分変位量使用データ最終日 26/5/15.2 変位量[m] 6 6日間のデータを１日ずつずらして計算プロットの位置は計算に用いた期間の中間変位量[m] 南北成分変位量使用データ最終日 26/5 5/15 上下変動日間のデータを１日ずつずらして計算プロットの位置は計算算に用いた期間の中間基準期間 24/1/1 24/1/3 比較期間 25/1/1 25/1/3 水平変動 3 Linear Trend : 18/4/1-23/4/1 -.2 固定局三隅９５０３８８ 2.2 変化率[m/yr] 変化率[m/yr] 固定局三隅９５０３８８東西成分変化率プロット最終日 26/4/15.6 土佐清水 pink 破線全期間 red 太線最近３ヶ月間 DE[m/yr] 第 15 図土佐清水および室戸観測点における地殻変動速度の変化 Fig.15 Crustal movement velocity change at Tosa-Shimizu and Muroto GEONET sites 58

14 16 Fig.16 Comparison of height change at the GEONET sites and levelling bench marks around Muroto peninsula. 17 Fig.17 Results of repeated precise measurements of distance of baseline cluster at Awa-Ikeda cluster, in the middle part of Shikoku

８－５中国・四国・九州地方の地殻変動

８－５中国・四国・九州地方の地殻変動 Crustal Movements in the Chugoku, Shikoku and Kyushu Districts Geographical Survey Institute 1 -(1) (9)GPS 2000 10 6 (Mj7.3) 2 co-seismic 2001 2 2 2000 10 6 310 4 -(1) (6) 5 -(1) (3) 2001 GPS 6 7 GPS 2001

８－２ 近畿・四国地方の地殻変動

８－２　近畿・四国地方の地殻変動