This tense and fearful voice came from a villager in Sare Township, Gyirong County, Tibet. The area is one of the hardest-hit regions in China and is among the closest locations to the glacier collapse site. The video shows thick fog covering the area, accompanied by continuous rumbling sounds. The most notable detail is that the news caption at the time clearly stated: “At around 10:30 a.m. on August 26, a mudslide disaster occurred on the Nepal side, causing major casualties and missing people at Gyirong Port in Gyirong County, Shigatse City, Tibet.” Keep in mind this was the initial official time given: 10:30 a.m. The village chief of Sechong Village in Sare Township, the Party secretary of Labi Village, also clearly recalled what happened during interviews with local media.
Take a look at Nepal. Oh my god, the mudslide is coming. The entire mountain across from us
is collapsing. I'm right here. This tense and fearful voice came from a villager in
Sare Township, Giron County, Tibet. The area is one of the hardest hit regions in China
and is among the closest locations to the glacier collapse site. The video shows thick
fog covering the area, accompanied by continuous rumbling sounds. The news caption at the time
clearly stated, at around 10.30am on August 26, a mudslide occurred on the Nepal side,
causing major casualties and missing people in Giron. Keep in mind, this was the initial
official time given, 10.30am. The village chief of Sechong Village in Sare Township
and the party secretary of Lopi Village also clearly recalled what happened during
interviews with local media.
Their accounts reveal a critical detail. Before the mudslide, there were massive rumbling
sounds and noticeable ground shaking, while the area did not experience the heavy rainfall
normally associated with mudslides. This unusual event is considered a typical warning sign
of high-altitude mountain collapse. Unfortunately, after hearing the sounds, they did not report
the situation or take any evacuation measures, missing a possible opportunity to help villagers
escape. More precise evidence came from a Chinese photographer and a traveler known
online as He Mu. On the morning of August 26, he conducted aerial photography at the
Asia No. 1 viewing platform. Three time-stamped photos he later released became key evidence
for reconstructing the early stages of the disaster.
While organizing the footage I shot that day, I found another major clue about the timeline.
It mainly comes from these three photos. The first photo was taken at 8.27am. The Kimshung
Peak was still completely calm. The second photo was taken at 9.33am. The glacier below
was still unchanged. The most important moment was the third photo, taken at 10.21am. You can
clearly see that there was still no glacier collapse. The glacier was still intact, but
smoke had already appeared below it. This shows that a rock collapse happened first, and then
caused a glacier above to collapse afterward. That is also why we began hearing the rumbling
sounds around 10.30am. The experience of Hubei tourist Wang Yijian closely matches this timeline.
According to cover news, Wang went hiking toward the Asia No. 1 viewing platform early on August
26. He said that as early as 7.20am, he heard rumbling sounds, which he later realized were
the first smaller glacier collapses. He recalled, around 10.30am, while we were hiking, we saw a
large-scale glacier collapse in the direction of the Lhotse Peak area. The collapse lasted about
2 or 3 minutes. The collapsed area was quickly covered by clouds, making it impossible to see
what was happening below, but we could clearly see dust and mist rising into the air. Early
reports from Chinese state media, including Xinhua, as well as the Phoenix News, all stated that the
mudslide occurred at 10.30am. They generally emphasized that a massive cross-border mudslide,
triggered by a mountain collapse on the Nepal side, swept into Girong County, Tibet. However,
the main collapse that determined the fate of Girong Port occurred at the second critical moment,
10.52am Beijing time. At that point, the glacier collapse fully erupted.
The USGS Global Seismographic Network intends seismic waves. It initially misidentified the
event as a natural magnitude 4.4 earthquake. Later that afternoon, USGS experts conducted
a manual review, ruled out a tectonic earthquake, and officially revised the event as ground
shaking caused by a massive landslide with an energy equivalent to a magnitude 5.2 event.
About 24 hours after the disaster, USGS released its first scientific report on the event.
Using satellite images from the US Landsat 9 satellite, the report officially revealed to
the world that the disaster originated from a massive high-altitude glacier collapse on the
northern slope of Lantang Riyang Peak. A section of the glacier measuring 0.8 miles wide suddenly
fractured and collapsed as a whole. The report was later widely cited by scientists around the world
and became one of the most important sources for reconstructing the critical timeline of the
mudslide. Based on eyewitness accounts and media reports, we can now reconstruct the disaster's
timeline. At 7.20am that morning, the first smaller glacier collapse occurred. At 10.21am,
the bedrock underneath Lantang Riyang Peak showed the first signs of a precursor rock collapse,
visible as dust and smoke rising from the base of the mountain. Milliseconds later,
local seismic instruments recorded the first clear ground shaking signal. USGS and associated press
analysis later found that this was not simply a spontaneous glacier collapse. Instead, the bedrock
underneath the glacier first became unstable and partially collapsed. The rockfall struck the
valley, generating an impact equivalent to a magnitude 3.8 earthquake. After the rock collapse,
large amounts of debris and ice began grinding, scraping, and pushing through earlier glacial
deposits deep in the valley. This may explain why some villagers reported seeing sparks through the
fog. The displaced glacial material entered the river valley, causing a sudden rise in water
levels and triggering the first wave of mudflow. This was the scene witnessed by villagers in
Saray Township at around 10.30am. Comparing this timeline with official surveillance footage
released from Girong Port, the video shows that the mudslide entered the port area at around 10.59am,
moving at an estimated speed of about 164 feet per second. The footage was cut off immediately
afterward. Taken together, the evidence shows a sequence from the bedrock collapse at 10.21am
to the glacier collapse at around 10.30am, and finally to the debris flow reaching Girong Port
at 10.59am. There was a window of roughly 30 to 38 minutes before the initial warning signs
and the disaster reaching the port. With modern geological monitoring technology,
a glacier and rock collapse of this scale could potentially be detected through acoustic sensors
or remote sensing systems. If monitoring agencies had issued warnings at 10.21am or 10.30am,
personnel at the bottom of the valley near the port would have had enough time to evacuate
toward higher ground along the slopes on both sides. For Nepal, timely warnings could also
have given residents living along the river more opportunities to escape and significantly reduced
casualties. However, due to failures by relevant Chinese authorities and local officials,
the critical evacuation window was missed. The result was that the impact of the disaster was
greatly amplified, turning it into a tragedy that took thousands of people. Now, looking at current
reports from Chinese state media, the reported time of the mudslide was uniformly changed from
the earlier 10.30am to 10.52am. More questions were raised when photographer Heimu said on his
Douyin account that all of his original videos related to the disaster had been removed by the
platform. These valuable raw materials, which had been used by experts for scientific analysis,
have now disappeared from the internet. Such strict control over first-hand footage
inevitably raises questions about whether authorities were attempting to conceal the
reality. However, no matter how much information is suppressed, the internet can still reveal some
clues. According to Mr. Zhou, an insider familiar with the emergency response system, relevant
authorities in Tibet had already detected abnormal conditions upstream through monitoring
system before the disaster and determined that the mudslide's path was directly heading towards
Girong port. Mr. Zhou said, looking at the disaster timeline, authorities in Tibet had already detected
the danger before the mudslide reached the port, and they determined the direction was toward Girong,
but officials in Tibet did not take it seriously, resulting in hundreds of people being buried
and the customs building being destroyed. At the time of the disaster, staff at the local
environmental monitoring center made a simple comparison between this event and the glacial
lake outburst flood that struck Girong in 2025. Based on previous experience, they believed the
scale of the disaster was manageable. As a result, they did not raise the warning level, did not
urgently report the situation to authorities in Beijing, and did not initiate evacuation procedures.
Mr. Zhou said, they waited until the mudslide reached Girong port before reporting it.
By then, it was already too late. This was a failure of disaster warning systems,
and someone in Tibet will definitely have to take responsibility. In its post-disaster briefing,
China's Ministry of Natural Resources stated that the disaster was a chain disaster triggered by a
high-altitude glacier collapse on Lantang, Riyang Peak in Nepal. Tens of millions of cubic meters
of ice fell from above, scraping glacial deposits along the valley and forming a high-speed debris
flow that later developed into a mudslide. Its physical characteristics were completely
different from the glacial lake outburst flood that occurred in July 2025. A high-altitude debris
flow has far greater density and destructive force than a conventional flood. Local officials used
experience from dealing with ordinary floods to respond to a sudden high-altitude rock and
Gansu geological expert Mr. Chen pointed out systemic problems in grassroots emergency
management. When monitoring departments detect abnormalities upstream, they should immediately
issue the highest-level warning, evacuate people downstream as quickly as possible,
and only then determine the full scale of the disaster. But local bureaucrats handled the
situation carelessly and used experience from the previous disaster to deal with a new threat.
Every time a disaster happens, we see the same pattern repeated. So many people were buried.
This was caused by human factors. Mr. Chen also cited flooding in Guangxi as an example,
saying similar delays in issuing warnings are widespread across different regions,
exposing weaknesses in China's disaster prevention system. In terms of the official response,
authorities did not activate a level two geological disaster emergency response until
about four and a half hours after the disaster occurred. Because the missing people included
261 foreign nationals from more than 20 countries, including 18 Americans, the incident quickly
attracted international attention. Under pressure from foreign embassies in China seeking information,
China's top leadership took over the rescue operation. Premier Li Chang traveled to the
disaster area in Tibet the following day. However, the official Politburo meeting report did not
mention any issue involving delayed reporting by officials. It also didn't explain why, after the
2025 disaster, authorities had not reassessed the location of the port or established an effective
cross-border early warning system. Regarding the deeper causes of the disaster, renowned water
resources expert Dr. Wang Weiluo conducted a detailed scientific analysis. He said the natural
trigger was the ice and rock collapse, but human changes to the local terrain were a key factor
that amplified the destructive impact. In analyzing the natural causes, Wang challenged the Chinese
government's single explanation that the disaster was simply caused by a glacier collapse. He cited
the view of French geologist Christine Cook from the University of Grenoble, who said the disaster
involved the collapse of both the glacier and the bedrock beneath it. Long-term global warming has
caused glacial retreat and instability across the Tibetan plateau, while the 2015 magnitude 7.8
earthquake in Nepal severely damaged the geological structure of the rock beneath the glaciers.
Over the years, the weakened rock eventually contributed to this massive collapse.
Regarding human factors, Wang emphasized the impact of engineering activities that altered
natural river channels. The key reason the mudslide dealt such a devastating blow to Girong Port
was that human activities changed the terrain at the point where the Donglin-Sangpo River reaches
The river channel became narrower, forcing the mudflow to rise higher. During the expansion of
Girong Port, efforts to secure more construction space inevitably led to modifications of the
surrounding environment. At the point where the Donglin-Sangpo flows into the Girong-Sangpo,
the river channel was significantly narrowed due to construction activities.
According to Fluid Dynamics, when tens of millions of cubic meters of debris rush downstream,
the floodwaters that would normally spread into surrounding floodplains and reduce their speed and
depth became confined within a narrow artificial channel. The narrower the river channel, the
smaller the cross-sectional area available for the debris flow. As a result, the height and speed
increase dramatically, while its destructive impact on surrounding facilities is amplified
exponentially. AI expert and founder of the Taiwan AI Labs, Du Yijun, expressed a similar view.
Girong Port is essentially a large illegal structure built on a river channel.
It compresses the flood passage. When humans compete with rivers for land,
nature eventually strikes back, and disaster becomes inevitable. Wang Weiluo further pointed
out that this type of engineering approach, which ignores high-altitude geological risks,
is not uncommon across the Tibetan Plateau. Professor Kong Feng from China Agricultural
University also said the region lies along the active Himalayan fault zone, where the effects
of earthquake disturbances can have long delays and continue supplying solid material for debris
flow for more than a decade. In such a fragile geological environment, major infrastructure
projects, including the planned Medok hydropower project on the lower reaches of the Yarlong
Sampo, also face extremely high risks from rock and ice collapses and debris flows. Tibetan writer
warned as early as 2018 that large-scale construction of reservoirs, hydropower stations,
and mining activities in the region could significantly increase geological disaster
risks and threaten the stability of the Asian water tower. This cross-border mudslide not
only destroyed Girong Port, but also caused major casualties downstream in Nepal. The disaster has
triggered criticism and frustration among Nepalese scholars and media over the lack of substantial
cooperation between the two countries. Dr. Basanta Raj Adhikari, a disaster research expert
at Tribhuvan University in Nepal, publicly called for stronger information sharing and early warning
systems between the two countries. According to an investigation by Reuters, Nepal had actively
sought cooperation with China on disaster monitoring, three months before the disaster
occurred. On May 27, Chinese and Nepalese officials held a meeting in Kathmandu. Nepal
proposed strengthening cooperation on monitoring floods, weather conditions, and glacier-related
disasters. It also called for joint risk reduction measures, including a shared survey of glacial
lakes and the creation of disaster risk maps. However, Nepalese hydrology expert Binod Parajuli
revealed that Chinese representatives said they had not yet received authorization to sign a
cooperation agreement. They only suggested further discussions, causing the cooperation plan to stall.
Nepal News reported that Nepal lacks a dense real-time monitoring network in its northern
high-altitude glacial lake regions and can only rely on periodic satellite surveys.
The 2025 flood disaster had already shown that the river valley was a high-risk area,
but progress on early warning infrastructure remained slow. The report suggested that if
both sides had reached a cooperation agreement, one year would have been enough to install a
sensor network upstream. Professor Kong Feng from China Agricultural University
also acknowledged that a major challenge in cross-border debris flow warnings is that the
disaster source is located outside the country, making it difficult to deploy ground-based
monitoring equipment. China's foreign ministry responded that it had always shared relevant
hydrological data in a timely manner and assisted Nepal with disaster prevention.
However, Reuters review found that China's latest warning data sent to Nepal
was on August 14, consisting of a routine monsoon rainfall forecast based on weather models.
There was a clear difference in both timing and nature between that forecast and the sudden ice
and rock collapse. Regarding data sharing, Dr. Wang Weiluo said China currently has the
technological capability to monitor glaciers across the Tibetan plateau. He pointed out that
Chinese researchers have even mapped the distribution of hidden rock glaciers across
the plateau. He believes one reason an effective warning system has not been established is that
hydrological and meteorological data can sometimes become politicized. He said if Nepal's relationship
with the authorities is good, China may provide more data, but if policies change, data sharing
can also be affected. Indian strategic scholar Brahma Chaleni also pointed out that Nepal has
long sought to establish a bilateral early warning agreement with China but has failed to create a
formal information sharing mechanism similar to the one they have with India. As climate change
increases the risk of cross-border geological disasters, the lack of transparent and real-time
data sharing could leave billions of people across the Himalayas facing greater safety risks.