Scientists drill 8,000 feet of ice in Antarctica and race against time before the hole freezes over again to bury the world's deepest seismometers and turn the South Pole into a giant ear for earthquakes across the entire planet.

Scientists drill 8,000 feet of ice in Antarctica and race against time before the hole freezes over again to bury the world’s deepest seismometers and turn the South Pole into a giant ear for earthquakes across the entire planet.

Written by Ana Alice

Published on 27/05/2026 at 04:41

Updated on 27/05/2026 at 04:42

Be the first to react!

Installed under kilometers of ice, the new seismic sensors at the South Pole take advantage of Antarctica’s isolated environment to capture global vibrations and enhance the monitoring of earthquakes, tsunamis, and Earth’s internal movements.

Two seismometers were installed more than 8,000 feet under the ice of Antarctica, equivalent to about 2,500 meters, in an operation conducted by the United States Geological Survey, the USGS, in partnership with the IceCube Neutrino Observatory, the University of Wisconsin-Madison, and the National Science Foundation.

According to the USGS, the equipment was designed to measure earthquakes on a global scale, support tsunami alerts, and enhance international seismic monitoring.

South Pole becomes Earth’s listening point

The installation took place under the South Pole ice cap, an area used for decades in seismic research.

ARTICLE CONTINUES BELOW

Ice drilling had a limited window

The opening of the wells was not done with a conventional drill.

According to Scientific American, engineers used pressurized hot water to melt the ice and create the necessary space to lower the instruments to the intended depth.

Robert Anthony, a geophysicist at the USGS and manager of the Deep Ice Seismometer project, compared the system’s power to that of a steam locomotive.

He told the magazine that the equipment concentrated the energy “through a hole the size of a coin” while advancing through the Antarctic ice.

One of the two seismographs was lowered 2.5 kilometers into the ice under the South Pole this month. Image: Skyler Grulke/IceCube/National Science Foundation

After opening, the team had a limited window to position the equipment before the hole refroze.

Nanometrics, the company responsible for part of the instrumentation, reported that the well remained open for about 72 hours to allow the installation of the pressure capsule, seismometer, data logger, and electronic components.

The pressure at the bottom of the well also required its own structure.

According to Scientific American, the seismometers were placed in a stainless steel container built to withstand up to 10,000 pounds per square inch.

How seismometers detect earthquakes

The operation of seismometers depends on a mechanism sensitive to movements.

Each instrument contains a small pendulum suspended in a magnetic field; when a vibration reaches the sensor, the system measures the force needed to keep this pendulum stationary.

According to Anthony, this type of measurement allows recording low-frequency movements, including oscillations related to Earth’s tides, influenced by the gravitational pull of the Sun and the Moon.

These data help scientists analyze how a fault moved during an earthquake and if the displacement had the potential to generate a tsunami.

David Wilson, director of the Global Seismographic Network, explained to Scientific American that seismic waves do not propagate only on the surface.

According to him, they travel in different directions, including downward, which makes deep instruments useful for recording components of the tremor that are not restricted to the visible ground.

The equipment should perform well in capturing long-period seismic waves associated with large earthquakes, especially events of magnitude close to or greater than 7.

Wilson stated that these waves can continue circulating for months, as the energy takes time to dissipate.

IceCube also helps monitor earthquakes

The installation took advantage of the IceCube infrastructure, an observatory located near the Amundsen-Scott Station at the South Pole.

The project was created to study neutrinos, particles that pass through matter with low interaction, and uses sensors distributed in deep boreholes in the Antarctic ice.

According to the USGS, IceCube comprises 86 wells about 2,500 meters deep, originally built to house more than 5,000 photodetectors.

This structure paved the way for the installation of seismic equipment at an unusual depth for Earth’s monitoring networks.

The seismic instrumentation arrived in Antarctica in December 2025, and the permanent system was installed by January 2026, according to Nanometrics.

The company reported that the set includes two Trillium 360 GSN Posthole seismometers and Centaur recorders.

Data may reveal Earth’s internal movements

Strong earthquakes produce waves that pass through different layers of the planet.

By measuring changes in speed, direction, and intensity of these signals, researchers obtain information about Earth’s internal structures without direct physical access to these regions.

Seismology uses this principle to study the crust, mantle, and other deep areas.

The greater the coverage and the lower the noise of the sensors, the more data becomes available for analyses on geological faults, ice dynamics, and seismic wave propagation.

At the South Pole, the location also reduces a specific type of distortion associated with Earth’s rotation.

According to the USGS, low-frequency signals captured by other broadband seismometers may suffer this effect; at the QSPA station, located on Earth’s rotational axis, this interference does not occur in the same way.

In addition to earthquake studies, the USGS states that the new sensors should expand the Global Seismographic Network and support activities related to tsunami warnings and nuclear test monitoring.

Nanometrics also links the system to the study of ice movement, global seismicity, and Earth’s deep structure.

Buried in one of the most isolated points on the planet, the instruments begin to record vibrations produced thousands of kilometers away.

For the researchers involved, the Antarctic ice acts as a natural shield against some surface noise and helps keep the sensors in a more stable condition.

Scientists drill 8,000 feet of ice in Antarctica and race against time before the hole freezes over again to bury the world’s deepest seismometers and turn the South Pole into a giant ear for earthquakes across the entire planet.

Installed under kilometers of ice, the new seismic sensors at the South Pole take advantage of Antarctica’s isolated environment to capture global vibrations and enhance the monitoring of earthquakes, tsunamis, and Earth’s internal movements.