China News Service, Chengdu, September 20 (Reporter Liu Zhongjun) The Sichuan Seismological Bureau officially announced the magnitude 6.0 earthquake intensity in Luxian County, Luzhou City in the afternoon of the 20th. The highest intensity of this earthquake is Ⅷ (8 degrees), with an area of about 103. Square kilometers.
Involving Fuji Town, Yuchan Sub-district and Jiaming Town, Lu County, Luzhou City, Sichuan Province, and Yunding Town, Longchang City, Neijiang City, a total of 4 towns (sub-districts).
At 4:33 on September 16, a magnitude 6.0 earthquake occurred in Lu County, Sichuan (29.20 degrees north latitude, 105.34 degrees east longitude) with a focal depth of 10 kilometers.
In accordance with the "Earthquake Field Work: Investigation Specifications" (GB/T18208.3-2011) and the "China Earthquake Intensity Table" (GB/T17742-2020), the earthquake emergency field team carried out intensity survey work in the disaster area.
Through the seismic damage investigation of 167 survey points in the disaster area, the seismic intensity distribution of the earthquake was determined with reference to the seismic structure background, aftershock distribution, focal mechanism, instrument intensity, remote sensing image and other scientific and technological support results, combined with the observation records of strong surface motions. , And in accordance with the "Guidelines for Seismic Intensity Map Mapping" (GB/T38226-2019), the "Luxian County 6.0 Earthquake Intensity Map of Sichuan" was compiled and completed.
The highest intensity of this earthquake is Ⅷ (8 degrees), the long axis of the isoseismal line is northwest west, the long axis is 62 kilometers, the short axis is 54 kilometers, and the area of VI degrees (6 degrees) and above is 2613 square kilometers. , Mainly involving 5 counties (cities, districts), 51 towns (sub-districts), including Lu County and Longmatan District, Luzhou City, Sichuan; Fushun County and Da'an District, Zigong City; Longchang City, Neijiang City; 1 district in Rongchang District, Chongqing City , 10 townships (streets).
The Ⅷ-degree (8-degree) district covers an area of about 103 square kilometers, mainly involving Fuji Town, Yuchan Street, Jiaming Town, Lu County, Luzhou City, Sichuan Province, and Yunding Town, Longchang City, Neijiang City, a total of 4 towns (streets).
The Ⅶdegree (7 degree) district covers an area of about 340 square kilometers, mainly involving Yuchan Street, Yusi Town, Tianxing Town, Fuji Town, Jiaming Town, Desheng Town, Niutan Town, and Longchang City, Neijiang City, Lu County, Luzhou City, Sichuan Province Hujia Town, Yunding Town, Jin'e Street, Shiyanqiao Town, Gufo Town, Tongsi Town, Fushun County, Zigong City, a total of 13 towns (streets).
The area of degree Ⅵ (degree 6) is about 2,170 square kilometers, mainly involving Xuantan Town, Shiqiao Town, Chaohe Town, Yunlong Town, Qifeng Town, Niutan Town, Fangdong Town, Desheng Town, Lu County, Luzhou City, Sichuan Province. Yunjin Town, Yusi Town, Zhaoya Town, Haichao Town, Pilu Town, Tianxing Town, Yuchan Street, Jiaming Town, Lishi Town, Shiyanqiao Town, Longchang City, Neijiang City, Longshi Town, Guhu Street, Shinian Town, Purun Town, Xiangshi Town, Jin'e Street, Huangjia Town, Shengdeng Town, Hujia Town, Shuangfeng Town, Jieshi Town, Yunding Town, Tongsi Town, Daisi Town, Fushun County, Zigong City Longzhen, Longwan Township, Huaide Town, Pipa Town, Zhaohua Town, Gufo Town, Donghu Street, Changtan Town, Shishi Town, Shidong Street, Longmatan District, Luzhou City, Jinlong Town, Shuangjia Town, Hushi Town, Texing Street, Anning Street, Yutang Street, Huilong Town, Niufo Town, Da'an District, Zigong City, a total of 50 towns (streets); Shuanghe Street, Anfu Street, Guangshun Street, Ronglong, Rongchang District, Chongqing City Towns, Qingsheng Town, Qingjiang Town, Longji Town, Changzhou Street, Panlong Town, Changyuan Street, a total of 10 townships (streets); a total of 60 townships (streets).
In addition, some areas outside the VI degree (6 degree) area were also affected, and some old houses were damaged.
(over)
Intensity explanation:
Ⅷ degree (8 degrees): a small number of civil buildings collapsed as a whole, most of the walls were cracked, flashed out and partially collapsed; brick-concrete houses collapsed individually, most of the walls were cracked; a small number of infill walls of frame houses collapsed, flashed out, and most of the wall-beam joints Cracked.
Degree Ⅶ(7 degrees): a few walls of civil-timbered houses collapsed locally, most of the walls were cracked, and the tiles were dropped; a few of the brick-concrete houses were cracked, most of the walls were slightly cracked, and roof cracks; a few of the wall columns and wall beams of the framed houses The joints were cracked and most of them were basically intact.
Degree Ⅵ (degree 6): a few of the walls of civil-timbered houses are cracked, and most of the tiles are broken, and most are basically intact; a few of the walls of brick-concrete houses are cracked, most of which are basically intact; the joints of individual wall columns and wall beams in frame houses are cracked, extremely large Most are basically intact.