{"id":7897,"date":"2025-04-27T13:00:20","date_gmt":"2025-04-27T04:00:20","guid":{"rendered":"https:\/\/www.envraddb.go.jp\/entesttest\/?page_id=7897"},"modified":"2026-01-21T18:33:33","modified_gmt":"2026-01-21T09:33:33","slug":"faq","status":"publish","type":"page","link":"https:\/\/www.envraddb.go.jp\/en\/special\/graph\/concentration-range\/faq\/","title":{"rendered":"FAQ about How to Read Concentration Range Charts"},"content":{"rendered":"<main>\r\n      <div class=\"contents\">\r\n        <div class=\"graph__faq\">\r\n          <div class=\"graph__faq__flex change-width100\">\r\n            <div class=\"graph__faq__flex__txt\">\r\n              <dl class=\"graph__faq__flex__txt__faq\">\r\n                <dt>\r\n                  <span>Q.<\/span>\r\n                  <p>Why was the radioactivity concentration in Japan high in the past?<\/p>\r\n                <\/dt>\r\n                <dd>\r\n                  <span>A.<\/span>\r\n                  <p>\r\n                    The radioactivity concentration was high in the past due to atmospheric nuclear tests conducted from 1945 to the 1980s or the Chernobyl Nuclear Power Plant accident that occurred in 1986.\r\n                  <\/p>\r\n                <\/dd>\r\n              <\/dl>\r\n            <\/div>\r\n          <\/div>\r\n          <hr \/>\r\n          <div class=\"graph__faq__flex\">\r\n            <div class=\"graph__faq__flex__txt\">\r\n              <dl class=\"graph__faq__flex__txt__faq\">\r\n                <dt>\r\n                  <span>Q.<\/span>\r\n                  <p>Why is the average value shown at a very low position in the chart?<\/p>\r\n                <\/dt>\r\n                <dd>\r\n                  <span>A.<\/span>\r\n                  <p>\r\n                    The number of samples that exhibited a high radioactivity concentration value is much smaller than the number of samples that exhibited a low radioactivity concentration value. As a result, the average value became smaller.\r\n                  <\/p>\r\n                <\/dd>\r\n              <\/dl>\r\n            <\/div>\r\n            <div class=\"graph__faq__flex__img\">\r\n              <img decoding=\"async\"\r\n                src=\"\/common\/images\/en\/special\/concentration-range_faq_1-en.png\"\r\n                alt=\"\u5e73\u5747\u304c\u4f4e\u3044\u65b9\u306b\u305a\u308c\u3066\u3044\u308b\u7406\u7531\u3092\u8aac\u660e\u3059\u308b\u30b0\u30e9\u30d5\u306e\u8aac\u660e\u56f3\"\r\n              \/>\r\n            <\/div>\r\n          <\/div>\r\n\r\n          <ul class=\"single-series-btn-list\">\r\n            <li class=\"btnMove\">\r\n              <a href=\"https:\/\/www.envraddb.go.jp\/en\/special\/graph\/concentration-range\/\" class=\"btn\"\r\n                ><img decoding=\"async\"\r\n                  src=\"\/common\/images\/graph\/graph_icon_create.svg\"\r\n                  alt=\"\"\r\n                \/>Generate the Concentration Range Charts<\/a\r\n              >\r\n            <\/li>\r\n            <li class=\"btnMove\">\r\n              <a href=\"https:\/\/www.envraddb.go.jp\/en\/special\/graph\/\" class=\"btn\">Return to Create a Chart or Table<\/a>\r\n            <\/li>\r\n          <\/ul>\r\n        <\/div>\r\n      <\/div>\r\n    <\/main>","protected":false},"excerpt":{"rendered":"Q. Why was the radioactivity concentration in Japan high in the past? A. The radioactivity concentration was h [&hellip;]","protected":false},"author":1,"featured_media":0,"parent":7895,"menu_order":30,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"page_category":[],"class_list":["post-7897","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/comments?post=7897"}],"version-history":[{"count":9,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7897\/revisions"}],"predecessor-version":[{"id":9143,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7897\/revisions\/9143"}],"up":[{"embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7895"}],"wp:attachment":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/media?parent=7897"}],"wp:term":[{"taxonomy":"page_category","embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/page_category?post=7897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}