{"_buckets": {"deposit": "4a1d0000-6975-48eb-aab3-f64276582fbb"}, "_deposit": {"id": "33518", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "33518"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00033518", "sets": []}, "author_link": ["130918", "130917"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "\u4f0a\u8c46\u5927\u5cf6\u306b\u65bc\u3051\u308b\u5730\u78c1\u6c17\u77ed\u5468\u671f\u5909\u5316\u306e\u7570\u5e38(1)"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1967-06-15", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "157", "bibliographicPageStart": "137", "bibliographicVolumeNumber": "45", "bibliographic_titles": [{"bibliographic_title": "\u6771\u4eac\u5927\u5b78\u5730\u9707\u7814\u7a76\u6240\u5f59\u5831 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]}, "item_4_description_13": {"attribute_name": "\u30d5\u30a9\u30fc\u30de\u30c3\u30c8", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_4_description_5": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "Simultaneous observations with three portable magnetometers are made at a number of stations on Oshima Island, a volcanic island about 100km south of Tokyo. The observations bring to light remarkable differences in short-period Z variation between various stations on such a small island, approximately 10 km in diameter. Z variations having a period of 30min. or so show a complete reversal of sign between the north and south sides of the island, while no marked differences are found for slower variations such as Sq. Such an anomaly seems to be caused by electric currents induced in the surrounding sea-water by changes in the geomagnetic field of external origin. Statistical as well as spectral analyses are made on the available data obtained along the N-S profile. Even if the anomalous part due to the sea-water effect is removed on a simple assumption, it seems likely that there still remains a substantial enhancement of the Z variations of short period. It is therefore concluded that Oshima Island belongs to the anomalous area of the \"\"Central Japan Anomaly\"\" which has been well-established by nation-wide observations in the past.", "subitem_description_type": "Abstract"}, {"subitem_description": 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Short-period Geomagnetic Fluctuations on Oshima Island (1)", "subitem_title_language": "en"}]}, "item_type_id": "4", "owner": "1", "path": ["80/4535/4927/4935", "9/504/4538/4929/4936"], "permalink_uri": "https://doi.org/10.15083/0000033518", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-05-30"}, "publish_date": "2008-05-30", "publish_status": "0", "recid": "33518", "relation": {}, "relation_version_is_last": true, "title": ["Spatial Dependence of Short-period Geomagnetic Fluctuations on Oshima Island (1)"], "weko_shared_id": -1}