Data Search:

Welcome to data search site by ERAN Database. You can search raw data in some DOI dataset as appeared at http://www.ied.tsukuba.ac.jp/database/ and already published data at outside source of our site.
You need to select radionuclides and sample type, then make decision about geographical region of data as latitude, longitude and altitude/depth of the sample. You also select duration of the data you want to know.
The search result contain DOI number and data record ID in original dataset(s) to identify original data if you need to know more. The search results also contain latitude, longitude, altitude/depth and time for radioactivity concentration with uncertainty those you want to know. Therefore, the search results can stand alone for research purpose.
You also need to agree when you use downloaded data in publication, you will adequately acknowledge the source of the data, specifically the data provider.
Please enjoy search results and use for your research works.

Select the desired area by drawing a rectangle on the map. (Click down at the left-upper corner and drag to the right-bottom corner, then release the button.)

*You can redraw the rectangle as many times as you like, and the last rectangle you draw will be used.
*To focus on other area, please scroll the mouse wheel to zoom out the map until the desired area is shown. Then move the mouse cursor to the center of the area and zoom in by scrolling the mouse wheel again. To watch the how-to movie, click here.

Left-Upper:

Right-Bottom:

Select a Radionuclide and Sample Type.

Radionuclide:
Sample Type:

Select desired duration.

Month/Year: between / and /

Select the value of Depth or Altitude in decimal.

Sampling Depth or Altitude (in kilometer): between . and .
*Click SURFACE radio button to search the data which does not have depth or altitude data but was observed on surface of the spot.