Rescuers search for people trapped at Shuanghe township, after an earthquake hit Changning county of Yibin city, Southwest China's Sichuan province, June 18, 2019. [Photo by Zeng Lang/chinadaily.com.cn]
2019年6月28日，在四川省宜賓市長寧縣發生地震後，救援人員搜尋被困在雙河鎮的人。
As of Thursday morning, over 200 aftershocks had occurred in Yibin, Sichuan province, after the city was struck by a magnitude 6.0 earthquake on June 17. Experts said the frequency of aftershocks, though comparatively high, is still within normal range.
截止這周星期四上午，四川省宜賓市自6月17日發生芮氏6.0級地震後，已發生超過200次余震。專家表示，余震的頻率雖然相對較高，但依然屬於正常現象。
The special geological conditions in the region, which boasts no big seismological faults but many small and widespread ones, are to blame for the frequent aftershocks. Those small faults could have easily been made active after the major quake, the experts said.
該區域特殊的地理條件，長寧一帶的地質構造規模小，但多條次級斷層縱橫交錯，這是引起余震多發的主要原因。專家説，在一次大的地震發生後小斷層容易被激活。
According to the China Earthquake Networks Center, 225 aftershocks above magnitude 2 had been recorded as of 11 am on Thursday. The biggest one occurred at 10:17 am on Thursday in Yibin's Gongxian county. It was the fourth aftershock above magnitude 5.
根據中國地震臺網中心的數據，截至週四上午11點，已記錄到225級以上的余震。 最大的一次發生在週四上午10點17分在宜賓珙縣。 這是5級以上的第四次余震。
"The frequency is within the normal range. The public don't need to panic," said Du Fang, director of the Sichuan Provincial Earthquake Forecast Research Center.
四川省地震預報研究中心主任杜方説：“這是屬於正常現象，民眾不需要特別擔心”。
The June 17 earthquake, which claimed 13 lives, is the biggest ever recorded in Yibin.
長寧“6.17”地震總計造成13人死亡，是宜賓有史以來最大的一次。
Du said the possibility of another major earthquake in the region is small as there is no active big seismological fault within a 50-kilometer radius of the stricken area.
杜方説，該地區發生另一場大地震的可能性很小，因為在受災地區半徑50公里範圍內沒有活躍的大地震斷層。
He said the earthquake and its aftershocks, though not high in magnitude, still resulted in some causalities and damage as their epicenters are close to the ground. Poor quality construction of buildings was also a contributing factor.
他説，地震及其餘震雖然幅度不大，但由於它們的中心接近地面，仍會造成一些傷亡和破壞。建築品質較差也是主要的因素。
Yi Guixi, a researcher with the center, said Yibin could continue to be hit by aftershocks for an extended period of time because of seismic interaction among secondary faults.
地震研究中心的研究員易桂喜認為,由於次級斷層之間的地震相互作用，宜賓可能會繼續受到余震的長時間撞擊。
"Generally, there has been a decline trend in the frequency," he said.
他説：“一般來説，頻率會呈下降趨勢”。
Du Bin, an official in charge of earthquake monitoring and forecasts, said Sichuan province has been accelerating the construction of its seismic intensity rapid reporting and early warning project. The project is expected to start operations this year.
負責地震監測和預報的負責人杜斌表示，四川省一直在加快建設抗震強度快報和預警項目。該項目預計將於今年開始運營。
