{"id":"https://openalex.org/A5149820751","orcid":null,"observed_orcids":[],"display_name":"Hiroaki Katayama","raw_author_names":["Hiroaki Katayama","Katayama, Hiroaki"],"full_name":"Hiroaki Katayama","works_count":1,"cited_by_count":0,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":0,"i10_index":0},"ids":{"openalex":"https://openalex.org/A5149820751","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I2801997990","ror":"https://ror.org/02772kk97","display_name":"Japan Meteorological Agency","country_code":"JP","type":"other","lineage":["https://openalex.org/I2801997990"]},"years":[2021]}],"last_known_institutions":[{"id":"https://openalex.org/I2801997990","ror":"https://ror.org/02772kk97","display_name":"Japan Meteorological Agency","country_code":"JP","type":"other","lineage":["https://openalex.org/I2801997990"]}],"topics":[{"id":"https://openalex.org/T10110","display_name":"earthquake and tectonic studies","count":1,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10271","display_name":"Seismic Imaging and Inversion Techniques","count":1,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13177","display_name":"Geological and Geophysical Studies","count":1,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10271","display_name":"Seismic Imaging and Inversion Techniques","value":4.1e-06,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10110","display_name":"earthquake and tectonic studies","value":2.4e-06,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13177","display_name":"Geological and Geophysical Studies","value":1.5e-06,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.8622999787330627},{"id":"120806208","wikidata":"https://www.wikidata.org/wiki/Q8072","display_name":"Volcano","score":0.6596999764442444},{"id":"158251709","wikidata":"https://www.wikidata.org/wiki/Q354025","display_name":"Intrusion","score":0.5490999817848206},{"id":"111461898","wikidata":"https://www.wikidata.org/wiki/Q2008968","display_name":"Seismic refraction","score":0.45570001006126404},{"id":"113740112","wikidata":"https://www.wikidata.org/wiki/Q5904738","display_name":"Slab","score":0.30880001187324524}],"counts_by_year":[{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":0}],"display_name_alternatives":["Hiroaki Katayama","Katayama, Hiroaki"],"block_key":"h katayama","works_api_url":"https://api.openalex.org/works?filter=author.id:A5149820751","awards_count":0,"updated_date":"2026-10-05T12:30:24","created_date":"2026-09-04T00:00:00"}