Backgrounder: Quake-hit Jiuzhaigou in Sichuan Province.
BEIJING, Aug. 9 (Xinhua) -- A 7.0-magnitude earthquake
struck a mountainous region in southwest China Tuesday night,
which killed at least 13 people and injured 175 people, as
rescue operations are in full swing on Wednesday.
The earthquake stricken area, in Jiuzhaigou County of Sichuan Province,
is located in the area of at least three major
tectonic earthquakes and other geological disasters over the past decade.
In May 2008, a 8.0-magnitude earthquake struck Wenchuan,
about 200 km south of Jiuzhaigou, killing more than 80,000 people.
In April 2013, a 7.0-magnitude quake hit Lushan,
about 360 km south of Jiuzhaigou, killing 196 people.
The quake-hit counties are located in the southeastern
edge of the Qinghai-Tibet Plateau near the low-lying Sichuan Basin.
Jiang Haikun, an expert of China Earthquake Networks
Center, said though the quakes were not related, they were
all caused by crustal movement of Bayan Har block
of the plateau, pushing the basin's borders.
The quake-prone area, known as Longmenshan fracture belt,
is considered one of China's most active quake zones.
Jiuzhaigou also borders the county of Zhouqu in Gansu
Province where a mudslide was triggered by the heavy rain
left 1,765 people died or missing on the same date seven years ago.
In June this year, a landslide hit Maoxian county,
180 km south of Jiuzhaigou, leaving 83 people died or missing.
Despite the disasters, Jiuzhaigou has a charm of its own.
Part of the Tibetan and Qiang Autonomous Prefecture of Aba,
Jiuzhaigou is particularly known for its indigenous
ethnic communities, complex landscape, and unique scenery.
The Jiuzhaigou Nature Reserve covers 720 square km , which
has stunning plateau lakes, waterfalls, and mountains.
It was open to tourists in 1984. Tourist numbers have
been climbing over the years. In 2016,
a record of 5.14 million tourists visited Jiuzhaigou.
Xinhua net and People's network