Valley of Eldgja. The 934-40 Eldgja eruption occurred along a 75 km-long fissure.| J-STAGE
Basaltic lava field, the Svartshengi geothermal power plant (right), and the Blue Lagoon (left).| J-STAGE
Normal fault at Thingvellir. The boundary between the North American plate on the left-hand side and the Eurasian to the right.| J-STAGE
The braided course of the Jokulfell downstream from Hofsjokull.| J-STAGE
Dettifoss waterfall. The waterfall is 44 m high. The river water is rich in suspended sediments and the waterfall volume is the greatest in Iceland.| J-STAGE
Reykjavik is a smokeless city. Almost 100% of the electricity and the heating depends upon hydropower and geothermal energy.| J-STAGE
Gullfoss waterfall. The two-step cataract has a total drop of 32 m.| J-STAGE
Geyser Strokkur. The geyser erupts at 5-10 minute intervals.| J-STAGE
Lakagigar fissure eruption. The 1783-84 Laka- gigar eruption resulted in a great famine, due to which Iceland lost 20% of its population.| J-STAGE
Earth hummock. Earth hummocks are among the periglacial phenomena. The knoll covered with vegetation is |about 0.5 m high.| J-STAGE
Jokulsarlon lagoon. The Breidamerkurjokull glacier has been retreating since about 1920. The lagoon formed at the glacial front shows a yearly increase.| J-STAGE
Palagonite ridge formed by subglacial eruption. Langjokull glacier in the background.| J-STAGE

Latest Issue

Journal of Geography (Chigaku Zasshi), 2018 Vol.127 No.3

2018 Vol.127 No.3

Lava Effusion during the March 2018 Activity of Shinmoedake Volcano, Kirishima Volcanic Complex

Following the October 2017 activity, Shinmoedake Volcano, located at the center of the Kirishima Volcanic Complex (southern Kyushu), began erupting on March 1, 2018. From March 6, intermittent vulcanian explosions occurred and lava extruded inside the crater. A pancake-shaped lava dome grew and the edge reached the northwestern crater rim on March 9 (foreground in the photo). Subsequently, the March 10 eruption scattered ballistic clasts up to 1.8 km from the crater. Moreover, the March 25 and April 5 vulcanian explosions produced numerous ballistics and small pyroclastic density currents cascading about 400 m down from the crater rim. The May 14 eruption discharged an ash-fall deposit extending to the Pacific coast of Miyazaki prefecture (>60 km from the vent). In addition, very small eruptions occurred at Ioyama Volcano (about 5 km northwest of Shinmoedake) on April 19 and 26. Takachihonomine Volcano (speculate peak) and Ohachi crater (frequently erupted before 1923 AD) can be seen in the background of the photograph. This aerial photo was taken with the cooperation of the Asahi Shimbun Company.

(Photograph & Explanation: Yasuo MIYABUCHI; March 9, 2018)

Original Article

Geomorphological Change of Lower Reach of the Fujikawa River
　before and after the Ansei Tokai Earthquake Based on Analyses
　of Historical Maps and Aerial Photographs,
　with Special Reference to the Origin of Kambara Jishinyama

Kei TANAKA, Takashi NAKATA, Ritsuko S. MATSU´URA,
Masayoshi TAJIKARA and Tokihiko MATSUDA

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 305.

DOI:10.5026/jgeography.127.305

Geochronology of Ashidani Formation
　in the Hida Gaien Belt at Kuzuryu, Central Japan

Takayuki MATSUMOTO

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 325.

DOI:10.5026/jgeography.127.325

Short Article

Support for Retired Workers Engaging in Agriculture
　in Toyota City, Aichi Prefecture and its Significance

Madoka UEMURA

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 343.

DOI:10.5026/jgeography.127.343

Special Issue: Liquefaction Phenomena in the Downstream Basin of the Tone River,
　Eastern Kanto Region, Japan from the Viewpoint of Earth Science:
　Toward Future Studies on Liquefaction

Overview of the Special Issue “Liquefaction Phenomena in the Downstream Basin
　of the Tone River, Eastern Kanto Region, Japan from the Viewpoint of Earth Science:
　Toward Future Studies on Liquefaction”

Hiroshi UNE, Taku KOMATSUBARA, Takayuki NAKANO,
Tomonori NAYA and Yoshinori MIYACHI

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 357.

DOI:10.5026/jgeography.127.357

Introduction to the Special Issue “Liquefaction Phenomena in the Downstream Basin
　of the Tone River, Eastern Kanto Region, Japan from the Viewpoint of Earth Science:
　Toward Future Studies on Liquefaction”

Hiroshi UNE, Taku KOMATSUBARA, Takayuki NAKANO,
Tomonori NAYA and Yoshinori MIYACHI

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 359.

DOI:10.5026/jgeography.127.359

Results of All-core Drilling and Trenching Surveys of Liquefied Sediments Associated
　with the 2011 off the Pacific Coast of Tohoku Earthquake (Original Article)

Taku KOMATSUBARA, Kiyohide MIZUNO, Masaru SAITO,
Takashi HOSOYA, Atsushi URABE, Yoshinori MIYACHI
and Osamu KAZAOKA

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 361.

DOI:10.5026/jgeography.127.361

A New Approach and Procedure for Trenching Surveys
　of Liquefied and Fluidized Strata in an Alluvial Lowland (Letter)

Masaru SAITO, Takashi HOSOYA, Osamu KAZAOKA,
Kiyohide MIZUNO and Mitsuo SATO

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 391.

DOI:10.5026/jgeography.127.391

Relationship between Liquefaction Damage and Landform Classification
　in Preparing Liquefaction Risk Assessments: Cases in Middle and Lower Reaches
　of the Tone River and the Tokyo Bay Area (Letter)

Mamoru KOARAI, Takayuki NAKANO and Hiroshi UNE

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 409.

DOI:10.5026/jgeography.127.409

Applying Earth Science to Mitigate Liquefaction Damage (Review Article)

Hiroshi UNE, Taku KOMATSUBARA,
Yoshinori MIYACHI and Takayuki NAKANO

Journal of Geography (Chigaku Zasshi), 2018, 127(3), 423.

DOI:10.5026/jgeography.127.423

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