{"_buckets": {"deposit": "34f0979b-8b7f-4d2b-9653-d96bb47d4d7a"}, "_deposit": {"id": "32914", "owner": "1", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "32914"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00032914", "sets": []}, "author_link": ["128348", "128347"], "item_4_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "\u7fa4\u901f\u5ea6\u53ca\u3073\u5408\u6210\u6ce2\u304b\u3089\u660e\u3089\u304b\u306b\u3055\u308c\u305f\u6771\u592a\u5e73\u6d0b\u6d77\u81a8\u4ed8\u8fd1\u306b\u304a\u3051\u308b\u8868\u9762\u6ce2\u7570\u65b9\u6027"}]}, "item_4_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1984-12-25", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "3", "bibliographicPageEnd": "398", "bibliographicPageStart": "383", "bibliographicVolumeNumber": "59", "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": "Anomalous dispersion curves of Rayleigh waves with group velocity maxima of 3.9 to 4.0km/sec at a period of 25 sec, near the East Pacific Rise, can be well explained by the upper mantle structure consisting of a very thin oceanic plate with a thickness of about 30 km and a low velocity zone with an extremely low shear velocity of 4.13km/sec. The Love wave response for the upper mantle structure is signigicantly different, namely group velocities of 4.30km/sec observed for periods from 20 to 110 seconds can be finely explained by a high shear velocity of 4.25km/sec in the low velocity zone. A surface wave polarization anisotropy of 3% in shear velocity is clearly present in the youngest region in the Pacific. If a volume fraction of involved molten pockets of 0.05 to 0.10 in the low velocity zone is assumed, the ratio of the minor to the major axes of an oblate spheriod of the molten pockets is estimated to be about one half. The surface wave polarization anisotropy in this region is inferred to be caused by the alignment of these partially molten pockets.", "subitem_description_type": "Abstract"}, {"subitem_description": 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