ISC-GEM 是由国际地震中心（ISC）牵头编制的全球仪器记录地震目录。它以一致的 ak135 速度模型和重定位算法，对1904年至2021年间约74,100次全球大型地震（Mw≥5.0）进行了重新校定——包括震中位置、震源深度和各震级标度，使不同时期、不同仪器记录的地震参数可相互比较。数据格式CSV（主目录+补充目录）、KMZ（Google Earth）。\n
需要注意，震级下限随时间变化显著：1904-1917年仅收录≥7.5事件，1918-1959收录≥6.25，1960年后才逐步覆盖≥5.0；做时间序列统计时需校正检测能力变化。补充目录中的地震（位置或震级高度不确定）不适用于精细分析，应优先使用主目录浅源地震的震源深度精度有限，不宜直接用于构造界面解释。\n
核心变量：\n
（1）发震时刻：UTC 时间，精度依台站覆盖程度而异；\n
（2）震中坐标：经度、纬度，经 ak135 模型重定位；\n
（3）震源深度：km，浅源地震精度受限于台站几何分布；\n
（4）矩震级：Mw目录的主要震级标度，波形反演或经验关系换算；\n
（5）体波震级：mb早期事件主要震级标度，短周期仪器测定；\n
（6）面波震级：Ms长周期面波测定，V12 经中国台网数据大幅补全；\n
（7）震源机制解：走向/倾角/滑动角，部分较大事件可用。", "ds_source": "
数据来源于国际地震中心（ISC）https://www.isc.ac.uk/iscgem/。", "ds_process_way": "", "ds_quality": "", "ds_acq_start_time": "1904-01-01 00:00:00", "ds_acq_end_time": "2021-12-31 00:00:00", "ds_acq_place": "全球", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "open-access", "ds_total_size": 8879683, "ds_files_count": 0, "ds_format": "*csv,*kmz", "ds_space_res": "", "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "51bf08f4-b33b-4f44-8ec5-4477609c67e6.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "0a4269e1-65f4-45f1-aeba-88ea3068eebf", "ds_serv_man": null, "ds_serv_phone": null, "ds_serv_mail": null, "doi_value": "", "subject_codes": [ "170.45" ], "quality_level": 0, "publish_time": "2026-06-24 16:25:45", "last_updated": "2026-06-24 16:25:45", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.earthquake.db7466.2026", "i18n": { "en": { "title": "ISC-GEM Global Instrumental Earthquake Catalogue (1904-2021)", "ds_format": "*csv,*kmz", "ds_source": "
The data comes from the International Seismological Center (ISC) https://www.isc.ac.uk/iscgem/.", "ds_quality": "", "ds_ref_way": "", "ds_abstract": "
ISC-GEM is a global catalog of instrumentally-recorded earthquakes led by the International Seismological Center (ISC). Using a consistent ak135 velocity model and relocation algorithm, it recalibrated approximately 74,100 global large earthquakes (Mw≥5.0) between 1904 and 2021-including epicenter locations, source depths and scales of various magnitudes, allowing seismic parameters recorded by different instruments to be compared with each other during different periods. Data format CSV (main catalog + supplementary catalog), KMZ (Google Earth).\r\n
It should be noted that the lower limit of magnitude changes significantly with time: only ≥7.5 events were included from 1904 to 1917, ≥6.25 events were included from 1918 to 1959, and ≥5.0 were gradually covered after 1960; changes in detection capabilities need to be corrected when making time series statistics. The earthquakes in the supplementary catalog (highly uncertain location or magnitude) are not suitable for fine analysis. The main catalog should be used first. The source depth accuracy of shallow earthquakes is limited and should not be directly used for structural interface interpretation.\r\n
Core variables:\r\n
(1) Earthquake occurrence time: UTC time, accuracy varies according to station coverage;\r\n
(2) Epicenter coordinates: longitude and latitude, repositioned via ak135 model;\r\n
(3) Focal depth: km, the accuracy of shallow earthquakes is limited by the geometric distribution of stations;\r\n
(4) Moment magnitude: the main magnitude scale of the Mw catalog, waveform inversion or empirical relationship conversion;\r\n
(5) Body wave magnitude: the main magnitude scale of mb early events, measured by short-period instruments;\r\n
(6) Surface wave magnitude: Ms long-period surface wave measurement, V12 has been greatly completed by data from China Network;\r\n
(7) Focal mechanism solution: strike/dip/slip angle, some large events are available.", "ds_time_res": "", "ds_acq_place": "global", "ds_space_res": "", "ds_projection": "", "ds_process_way": "", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "belong_to_nieer": false, "ds_topic_tags": [ "ISC-GEM", "地震", "地震目录", "ak135 速度模型" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "全球" ], "ds_time_tags": [ 1901, 1902, 1903, 1904, 1905, 1906, 1907, 1908, 1909, 1910, 1911, 1912, 1913, 1914, 1915, 1916, 1917, 1918, 1919, 1920, 1921, 1922, 1923, 1924, 1925, 1926, 1927, 1928, 1929, 1930, 1931, 1932, 1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 ], "ds_contributors": [ { "true_name": "国际地震中心", "email": "admin@isc.ac.uk", "work_for": "国际地震中心", "country": "英国" }, { "true_name": "全球地震模型基金会", "email": "info@globalquakemodel.org", "work_for": "全球地震模型基金会", "country": "意大利" } ], "ds_meta_authors": [ { "true_name": "国际地震中心", "email": "admin@isc.ac.uk", "work_for": "国际地震中心", "country": "英国" }, { "true_name": "全球地震模型基金会", "email": "info@globalquakemodel.org", "work_for": "全球地震模型基金会", "country": "意大利" } ], "ds_managers": [ { "true_name": "国际地震中心", "email": "admin@isc.ac.uk", "work_for": "国际地震中心", "country": "英国" }, { "true_name": "全球地震模型基金会", "email": "info@globalquakemodel.org", "work_for": "全球地震模型基金会", "country": "意大利" } ], "category": "灾害" }