Indoor Temperature and Humidity in Temporary Housing built at Miyako City in Iwate Prefecture following the Great East Japan Earthquake

Indoor temperature and humidity were observed for almost two years, from March 2012, in tempo rary housing built at Miyako City in Iwate Prefecture following the Great East Japan Earthquake. Average diurnal variations in temperature and humidity were compared between different types of vacanttemporary housing and were examined in temporary housing an elderly person lives. Indoor daytime temperatures in temporary housing of light-gauge steel structure with exposed and non-insulated iron beams were 1.7—3.4 Celsius colder in winter and approximately 1 Celsius warmer in summer than in wooden temporary housing, resulting in large diurnal temperature range. Furthermore, in this type of temporary housing, the temperature of the iron beams in daytime was higher and the temperatures ofthe floor face in daytime and the iron beams at night were colder than indoor temperature in winter and summer. Compared with other types of temporary housing, relative humidity was higher throughout the day, and there was a 50% increase in hazardous situations causing heatstroke exceeding the "strict alert" level. The diurnal range and the spatial and vertical differences in indoor winter temperature tended to increase as external daily minimum air temperature became colder, exceeding 7 Celsius on average as a result of heating effect

High-resolution seismic reflection profiling across the Shiraiwa fault, eastern margin of the Yokote basin fault zone, northeast Japan : data acquisition and processing

The eastern margin of the Yokote basin fault zone extends about 56km at the western foot of the Ou Backbone Range, northeast Japan. The Rikuu earthquake (M=7.2) occurred in the Ou Backbone Range (Mahiru Range) on 31st August, 1896. Associated with this earthquake, four thrust faults-Obonai, Shiraiwa, Ota, and Senya fault3 appeared on the surface of the western foot of the Mahiru Range. These faults were highly sinuous with numerous gaps and en echelon steps. We conducted a high-resolution seismic reflection profiling survey across the Shiraiwa fault. The obtained seismic reflection data were processed by conventional common mid-point methods, post-stack migration, and depth conversion. The subsurface structure across the Shraiwa fault is characterized by branched low-angle reverse faults and conjugate back-thrust. The emergent thrust associated with the 1896 earthquake is regarded to be a subsidiary reverse fault