Shen Manying had a message on her cell phone from Xia Lan. After reading it, she asked the officer:

"Is there a seismic waveform diagram?"

Soon, a soldier trotted over holding a circle of paper. After unfolding the long picture, Shen Manling immediately saw the clues on the picture. Under normal circumstances, the earthquake waveform should be a continuous line of violent fluctuations, and the one in front of her was This picture is more like a person's electrocardiogram. After a period of violent fluctuations, it returns to a very small amplitude, and then oscillates violently again, and so on.

"This picture is a bit weird!" Cao Rui said.

"Xia Lan just sent me a message, telling me that the seismic waveform she saw was not normal. Now combined with the situation of the impact crater, I think I can try to explain this waveform." Shen Manling replied.

She put away the waveform that was rustled by the raindrops and continued:

"According to the telemetry data of the ice flying in the atmosphere, the ice split into multiple small segments before the impact. I initially thought this was the natural disintegration of the ice at high temperatures. Now it seems not, they have a plan The ground split spontaneously. Judging from the waveform diagram, it should have split spontaneously into 9 small segments of equal mass.

Then it hit the same location on the ground in pulses at uniform intervals. This can explain the crystals that appear on the ground and why the impact crater we see is small and deep, not wide and shallow."

"Could it be a natural coincidence?" the officer asked.

"Theoretically it is possible, but it is equivalent to a hundred howitzers hitting all the shells into a crater." Shen Manling replied.

"Then why did they do this? Make such a deep hole in this vast desert!" the officer asked in confusion.

Shen Manling and Zhou Cheng looked at each other and said nothing. The existence of Rain Man is still only a secret known to a few people. Cao Rui took over the conversation:

"How deep is the deep well in the middle of this pit? And what's the reason for this noise in the well?"

The officer pointed to the dark wellhead that was still rumbling and replied:

"Director Cao, we arrived an hour before you. Before you arrived, we sent a drone down. There is a rock formation about ten meters below the wellhead. There are several cracks in the rock formation, and several streams of water flow from it. The water flowing out of the crack should be an underground river. It is the sound made by water falling into a deep well.

When we continued to let the drone fly downward, the signal interference became very serious. We judged that it should be the combined effect of water mist and radioactive contamination, and we immediately mobilized a wired drone specially used for deep well detection. Now It's almost ready and we can start detecting it right away."

The rain in the sky was getting heavier. The sand that was originally mottled in color due to the rain has now changed from dry light yellow to dark brown. The officer said:

"Let's go to the tent. This rain contains low-dose radioactive contamination. Although we are wearing protective clothing, we will still be exposed to ionizing radiation if we are exposed for too long. And the main console of the wired drone is also in the tent. We You can see real-time footage there.”

At this time, a multi-rotor drone dragged a slender cable slowly into the dark hole in the middle of the funnel amidst the buzzing sound of its motor. The group of people also followed the officer to the edge of the funnel. In a tent not far away, the real-time picture of the drone camera was displayed on the screen.

Soon, they saw on the screen the crack in the underground river that the officer had just mentioned. Several streams of white water spewed out from the crack, and then fell into the bottomless underground. The height of the drone further decreased.

, even with strong spotlights, visibility is gradually declining due to water mist.

The rock wall is not smooth, and is as uneven as the surface of a bitter melon. As the height decreases, the well wall gradually becomes smaller.

The images returned by the drone camera were even blurrier. The officer said:

"It has descended to 280 meters, and the ultrasonic wave shows that it is still 50 meters away from the bottom of the pit. We will soon be able to see what it looks like down there."

The officer pointed to a number on the screen.

"However, the temperature at the bottom of the pit is very high, reaching 70 degrees. There is not only water mist, but also evaporated water vapor. It has a great impact on the clarity of the picture."

Cao Rui glanced at the pouring rain outside the tent and asked, "Can the drone handle it?"

"No problem, this is a drone specially designed for deep well exploration. It is designed to be waterproof, moisture-proof and high-temperature resistant," the officer replied.

The drone swayed and finally arrived at the bottom of the impact crater, which is more than 330 meters deep. From the camera images on all sides and downwards, it can be seen that the space at the bottom of the crater is slightly larger than the shaft above, and the entire rock mass

It shows a downward spreading anti-funnel trend.

The bottom of the pit and the surrounding rock walls were wet, reflecting a mirror-like luster under the light.

"Look, Old Zhou, the bottom and side walls of this pit are so smooth, completely unlike the bumpy side walls just now!"

"Yes, it looks like it has been eroded by water for a long time. And you see..."

Zhou Cheng pointed to the picture of the camera looking down.

"There is no sedimentation or water accumulation at the bottom of the pit. It rained so heavily that day, and there is an underground river that has stopped flowing above. If there is no water outlet, it should be a mud pond below."

"Search the bottom of the pit carefully to see if there is a water outlet!" The officer's order had just been issued, and before the operator had time to respond, the screen on the table began to tremble violently.

Almost at the same time, the entire earth shook with the loud noise of the train speeding overhead. Cao Rui glanced around and saw that the two soldiers on the side of the funnel who were assisting in conveying cables to the drone had dropped their hands.

The equipment was running toward them in panic. What was even more frightening was that behind them, the cable bracket that had been standing upright sank as if it had been swallowed.

"Lao Zhou! Sister-in-law! Run!" Cao Rui shouted.

Zhou Cheng took his wife's hand and got out of the tent and started running in the opposite direction of the funnel pit despite the heavy rain. He glanced back and saw that the tent closer to the edge of the pit was slowly tilting towards the funnel pit.

It slid in the direction of the pit. Everyone was running desperately away from the edge of the pit.

Zhou Cheng pulled his wife and ran as hard as he could, but the sand under his feet had become muddy due to the heavy rain. He felt like he was struggling in a pool of syrup. He didn't dare to look back anymore, as the ground rumbled.

and the shouts of the people filled his ears.

His breathing became more and more difficult, and it became more difficult to lift his feet. Suddenly, he felt that the ground under his feet began to tilt, and his hard running was like running on a treadmill, which did not allow him to move forward. He looked at the few people in front of him.

Cao Rui, who was running desperately, shouted:

"Old Cao!"

Cao Rui glanced back at him, and Zhou Cheng not only saw Cao Rui's panic expression, but also saw the toppling Yadan boulder reflected on his mask!

Zhou Cheng used all his strength to pull Shen Manying in front of him, and then pushed her back with both hands. His wife staggered and rushed to Cao Rui in front of him, and was about to fall. Cao Rui Quick eyes and quick hands caught her.

"Don't look at me! Run!" Zhou Cheng shouted hoarsely. Cao Rui understood what his old friend meant, and pulled Shen Manling to run desperately in the mud. Shen Manling tried to turn around several times, but she couldn't. Because Cao Rui pulled hard and couldn't turn his head.

Zhou Cheng was out of breath from the violent exercise just now and his movements became sluggish. He could clearly feel that the ground beneath his feet had tilted significantly. He began to walk hard forward in the sticky sand on his hands and feet. Fighting desperately against the ground that was sliding backwards.

Gradually, all he could hear in his ears was his wife's intermittent shouts and his own heavy breathing. Just when he was completely unable to pull his feet out of the mud again, the roar from the ground disappeared, and the ground beneath his feet stopped. The flow stopped. He collapsed on the ground and gasped for air, but there seemed to be no oxygen in every air he inhaled.

At this time, a pincer-like hand grabbed his arm and dragged him forward. When the ground became level again, the hand let go of him. Then, the figure also collapsed to the ground. , gasping for air. Only then did he see clearly that it was his old friend Cao Rui.

Looking back, the sight in front of him made his hair stand on end. The originally steep "funnel" had now turned into a huge cone-shaped shallow pit, and he was on the edge of this huge pit. There were several pieces scattered on the pit wall that had been severely twisted. The deformed remains of the blue tent, several helicopters with deformed rotors, and even their own plane were all half-buried in the sand.

What is even more horrifying is that the rows of Yadan boulders that originally stood on the edge of the "funnel" have slipped into the crater. Among them, several boulders have collided together and slid into the middle of the crater.

The dark clouds dispersed in the howling north wind, and the scorching sunshine shone on the ground again. Under the scorching sun, the sand quickly dissipated with a slight "crackling" sound. Cao Rui turned over and crawled. When he got up, his body was covered with mud and sand:

"We have to continue to retreat. After the water evaporates, the sand may still slide down."

His wife Shen Manling and Cao Rui helped Zhou Cheng up together. At this moment, there was another sound of rocks colliding in the middle of the cone pit, and the sand near the center of the pit slid down a short distance again, but soon It stopped.

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