A newly trained machine-learning system has, for the first time, picked out thousands of previously unrecognized small earthquakes, exposing the sharply defined boundary of the Yakutat microplate as it descends beneath the North American plate.

The Yakutat oceanic plateau is effectively trapped in a complex tectonic collision zone, where it is being squeezed between major plate systems as subduction continues beneath North America. This tightly packed “tectonic traffic jam” shapes the broader geodynamic environment of south-central Alaska. 

The precise geometry and interaction of these plates strongly influence how stress builds and is released across the region, directly affecting its earthquake frequency and volcanic activity. By resolving this fine-scale seismicity, researchers gain a clearer picture of how deformation is distributed along one of North America’s most active and structurally complex subduction systems.

Reshaping the understanding of the Yakutat plate edge

A detailed new analysis published in The Seismic Record by Meghan Miller of Australian National University and her colleagues has sharply refined the mapped extent and boundary of the Yakutat plate in southern Alaska.

To build this high-resolution picture, the team combined data from both permanent seismic stations and a temporary network deployed between 2018 and 2021. Using a machine-learning workflow, they generated an expanded earthquake catalog that significantly increased the number of detected events in the region.

The results revealed a previously unrecognized linear cluster of roughly 1,750 small earthquakes stretching about 155 miles from northwest to southeast. This continuous seismic band outlines the plate boundary with far greater clarity than earlier conventional studies had been able to achieve.

By analyzing ambient seismic noise to image deeper structures, the researchers determined that the earthquake line delineates the edge of the Yakutat microplate as it subducts at a shallow angle directly beneath the North American plate, notably without a separating mantle wedge typically seen in many subduction zones. This revised geometry places the Yakutat microplate directly beneath the apex of curvature of the Alaska Range and aligns it with the Denali Fault system, a major continental-scale fault network in south-central Alaska.

New Alaska plate map aligns with deep tremor signals and major fault zone

The researchers suggest that stress generated by the collision between the Yakutat microplate and the North American plate could be transmitted through the overriding crust all the way to the Denali Fault, potentially contributing to the 2002 magnitude 7.9 Denali earthquake.

They also note that the newly identified boundary aligns closely with earlier research based on tectonic tremor signals, which had already implied the Yakutat plate extends farther east than previously mapped. According to Miller, the newly revealed linear structure matches the end point of that tremor activity, describing it as a feature that had not been observed before but fits precisely with independent seismic evidence.

Thus, the mix of earthquakes and tremor likely reflects differences in rock composition along the plate. West of the sharp boundary, tremor suggests ductile rocks that slip slowly and release stress without earthquakes. At the earthquake-defined edge, the rock appears more brittle, allowing stress to build and rupture in small quakes.

Looking ahead, the researchers plan to extend their analysis further back in time, or before 2018, to identify additional earthquakes along the Yakutat boundary and to better resolve the structure of the highly compressed tectonic zone closer to Alaska’s southern coast. They also emphasized that the machine-learning approach was key to revealing the previously unseen edge of the Yakutat plate.

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Japan’s expanding military capabilities are prompting calls from Chinese military experts for faster upgrades to the country’s aircraft carrier groups and enhanced combat readiness. The concern comes as Tokyo strengthens its defence posture through the deployment of long-range anti-ship missiles and military assets on islands near Taiwan, developments that Beijing views as increasingly significant to regional security. 

Analysts also pointed to a recent simulation that underscored the risks posed by Japan’s growing strike capabilities. Amid heightened tensions in December, following remarks by Japan’s prime minister on Taiwan, the PLA Navy’s Liaoning carrier strike group took an uncommon route through waters east of Japan. 

Tokyo responded by scrambling 12 F-2 fighter jets carrying a combined 64 ASM-2 anti-ship missiles, a move that Chinese analysts cited as evidence of Japan’s ability to rapidly concentrate anti-ship firepower against high-value naval targets. 

Analysts call for stronger carrier defenses against saturation attacks

The scale and complexity of Japan’s training activities have drawn particular attention from Chinese military observers. Fu Qianshao, a military expert and former PLA Navy officer, argued that exercises involving large numbers of fighter aircraft and anti-ship missiles demonstrate the potential threat posed to aircraft carrier strike groups. 

As quoted by the South China Morning Post, Fu noted that saturation attacks designed to overwhelm defences remain a significant challenge for any navy, underscoring the need for China to continue improving the survivability, air defence capabilities and operational effectiveness of its carrier formations.

Japan is also fielding upgraded Type-12 anti-ship missiles with a much longer range as part of its broader defense expansion. Positioned near the East China Sea, the missiles could allow Japan to cover a far larger area than before, increasing pressure on Chinese naval operations in the region. 

According to military commentator Song Zhongping, the deployment could create additional challenges for China’s aircraft carrier groups during a conflict. He argued that coordinated attacks involving large numbers of missiles and fighter aircraft, particularly when combined with stealth platforms, could place significant strain on a carrier strike group’s defensive systems.

Growing threat from Japan’s air-launched missile plans

Attention is increasingly turning to Japan’s future missile programs, particularly the prospect of an air-launched variant of the Type 12 anti-ship missile. Chinese military observers argue that such a weapon could provide greater range, speed and targeting flexibility than Japan’s current anti-ship missile inventory, further strengthening Tokyo’s ability to strike maritime targets. 

Similar concerns appeared in a February article published by Aerospace Knowledge, a magazine affiliated with the Chinese Society of Aeronautics and Astronautics. The publication described Japanese air power as a credible challenge to Chinese carrier strike groups, while also arguing that China’s integrated naval and air strike capabilities could exert significant pressure on Japan’s light aircraft carriers in a potential conflict.

Furthermore, Chinese military observers believe Japan’s future long-range anti-ship strike capability will rely heavily on F-2 fighter jets armed with air-launched Type 12 missiles, enabling attacks against naval targets from distances beyond 310 miles. Analysts argue that this evolving threat environment reinforces the need for the PLA Navy to continue improving both its equipment and operational training.

Attention has also focused on Japan’s F-35A fleet, which can carry a combination of air-to-air and anti-ship weapons. Armed with stealthy Joint Strike Missiles (JSMs), the aircraft could potentially approach Chinese naval formations with a reduced risk of detection and engage targets from significant stand-off ranges, presenting an additional challenge for carrier strike group defenses.

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As the flying car industry moves from prototype development toward commercial deployment, attention is increasingly shifting to the technologies needed to support safe and scalable operations. 

Su Qingpeng, founder and CEO of GAC Govy, a low-altitude mobility company incubated by GAC, recently described solid-state batteries as the “essential path” for the future of flying cars, highlighting their potential to deliver the energy density and safety required for aerial mobility.

At the same time, investor expectations are evolving. Rather than focusing primarily on technical specifications and performance claims, capital markets are placing greater emphasis on practical indicators of commercial success, including vehicle deliveries, profitability, production readiness, and the timeline for obtaining airworthiness certification.

Flying cars follow a path similar to early EVs

Su compared the current stage of the flying car industry to the position electric vehicles occupied roughly a decade ago, when the market was still transitioning from early adoption to large-scale growth. He argued that aviation mobility could advance even more rapidly than the EV sector once adoption reaches a critical threshold. 

According to his outlook, the industry is expected to establish a sustainable commercial ecosystem by 2030, supported by technological progress, regulatory approvals, and the gradual rollout of low-altitude transportation services, CarNewsChina reported.

After entering the market with its first production model, GAC Govy has been advancing toward regulatory approval and commercial deployment. Its flagship aircraft, the Govy AirCab, opened for pre-orders in 2025 and officially entered production in May 2026. 

The Chinese company aims to complete airworthiness testing and secure Type Certification (TC) by the end of 2026, while Production Certification (PC) is targeted for the first half of 2027, paving the way for larger-scale manufacturing and commercial operations.

Safer, longer-range flying cars depend on solid-state batteries 

In the long run, battery technology is emerging as one of the most important factors shaping the future of aerial mobility. Su noted that solid-state batteries will play a central role in enabling the next generation of flying cars by delivering both the energy density required for longer flight ranges and the safety standards needed for commercial operations. 

Furthermore, the business case for solid-state batteries is markedly different in aviation than in the automotive sector. Whereas carmakers are pursuing the technology largely to lower costs and improve competitiveness in high-volume markets, flying car manufacturers can absorb significantly higher battery costs due to the economics of aircraft production. Su noted that conventional aircraft are far more expensive to build than automobiles, giving eVTOL developers greater flexibility to adopt advanced battery technologies. 

As a result, solid-state batteries can already be deployed in limited production runs for aerial vehicles. Over time, broader adoption across the automotive industry is expected to drive down battery costs, making flying cars more economical to operate and opening the door to wider commercial use.

However, Su also warned that flying car production is likely to scale more slowly than traditional automobiles. Extensive design iterations, airworthiness certification, and manufacturing validation requirements make the path to mass production longer and more complex, resulting in a gradual ramp-up in deliveries.

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Chinese state media has revealed what it described as the first operational live-fire evaluation of the PLA’s new HQ-16F air defense missile. Footage broadcast by CCTV showed troops from the 73rd Group Army, part of the Eastern Theater Command responsible for operations around Taiwan, conducting the exercise in the Gobi Desert after traveling more than 1,200 miles from their home base in Fujian Province to train with the newly issued system.

During the test, a missile was launched from a mobile platform and successfully intercepted an aerial target at roughly 31 miles, according to CCTV. The live-fire exercise was presented as a validation of the system’s operational readiness under field conditions.

Footage also showed the missile’s streamlined, wingless design, which relies on four rear-mounted fins for flight control. This configuration reduces drag while enabling rapid maneuvering and course corrections to engage moving targets at medium range.

New missile is latest variant in China’s Hong Qi-16 air defense family

Although state media avoided identifying the missile by name, footage from the exercise appeared to reveal its designation. A close-up shot showed a nameplate marked “HQ-16F”, while the missile’s external configuration closely resembles the HQ-16FE, the newest export-focused member of China’s Hong Qi (“Red Flag”) 16 air defense family that debuted publicly at the 2022 Zhuhai Airshow, the South China Morning Post writes.

The missile features a streamlined, wingless design that relies on rear control fins for maneuvering. This configuration reduces aerodynamic drag and overall weight, helping improve flight efficiency and potentially increasing engagement range compared with earlier designs.

The HQ-16 family forms a key part of China’s medium-range air defense network and is available in both land-based and naval configurations. Footage from the recent test showed the missile being launched from fully vertical cells, indicating compatibility with shipborne vertical launch systems and suggesting potential cross-platform deployment.

While Beijing has not released official performance data for the HQ-16F, Chinese domestic variants have historically offered greater capabilities than export models. The export-oriented HQ-16FE is designed to engage a wide range of threats, including aircraft, tactical ballistic missiles, and supersonic cruise missiles. 

HQ-16F can engage targets from 2.2 to 100 miles away

According to publicly available specifications, it can intercept conventional aircraft at ranges of up to about 100 miles, a fourfold increase over the original HQ-16, while retaining the ability to engage targets as close as roughly 2.2 miles away. The system can reportedly target threats flying as low as 50 feet above the ground and at altitudes reaching approximately 17 miles.

In terms of reach, the HQ-16FE is often compared to the US Patriot PAC-2, while its sensor suite and missile-defense functions are considered closer to those of the more advanced Patriot PAC-3. The two systems, however, employ different interception methods. The PAC-3 uses a hit-to-kill approach, destroying incoming threats through direct kinetic impact rather than a conventional explosive warhead.

The new HQ-16F missiles add another layer to the PLA’s already extensive air defense network, which covers threats from low altitudes to near space. Their deployment is particularly significant because they are being fielded by the PLA’s 73rd Group Army, based in Xiamen across the Taiwan Strait from Taiwan and considered a key frontline force in any cross-strait contingency.

The move comes as analysts debate how Beijing might seek to pressure Taiwan. Foreign policy commentator Eyck Freymann has argued that China’s most likely path could be a prolonged blockade rather than a direct invasion. In that context, the deployment highlights Beijing’s continued efforts to strengthen the military capabilities of units positioned closest to Taiwan.

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China’s CATL has outlined a concrete roadmap for the commercial rollout of sodium-ion battery technology, announcing that customer deliveries of its first sodium-ion energy storage systems will begin in September. 

The company also expects sodium-ion battery shipments to reach the gigawatt-hour scale in 2026, marking a significant step toward wider adoption of the technology. The timeline was revealed by CATL’s energy storage solutions CTO, Lin Jiubiao, during a sodium-ion battery industry event in China. 

The announcement builds on the company’s earlier statements that sodium-ion batteries are moving into large-scale production and deployment across a range of applications, including energy storage and electric mobility.

Sodium-ion batteries emerge as a viable alternative to lithium

Long viewed as a promising alternative to lithium-based technologies, sodium-ion batteries are now approaching their first large-scale commercial deployments. While research into sodium-ion chemistry dates back to the 1970s – around the same time as lithium-ion batteries, the technology remained largely in the background for decades, CarNewsChina reported.

Early sodium-based cells struggled to match lithium batteries in key areas such as energy density, cycle life, and overall performance, slowing their path to market. Recent advances in materials and manufacturing, however, have significantly improved their competitiveness, paving the way for broader adoption in energy storage and other applications.

After several years of development, CATL has steadily expanded its ambitions in the sodium-ion battery market, as the company first introduced its inaugural sodium-ion battery in 2021, marking its entry into the sector. 

Four years later, in April 2025, CATL unveiled its second-generation Naxtra sodium-ion battery and outlined plans to deploy the technology across a wide range of applications, including passenger and commercial vehicles, battery-swapping networks, and stationary energy storage systems.

Lower production costs pave the way for sodium-ion expansion

Declining raw material and supply-chain costs are helping pave the way for the wider commercial adoption of sodium-ion batteries. As production scales and manufacturing processes mature, the economics of sodium-ion technology are becoming increasingly attractive, improving its competitiveness against established battery chemistries and supporting broader deployment across energy storage and mobility applications.

Industry suppliers say sodium-ion battery materials are beginning to benefit from the same economies of scale that helped drive the success of lithium iron phosphate (LFP) batteries.

As production capacity expands, manufacturing volumes are increasing and costs are steadily falling, improving the commercial outlook for the technology. At the same time, hard-carbon anodes, one of the key components used in sodium-ion batteries, have moved into industrial-scale production, marking another important milestone in the development of a mature supply chain.

One of the main advantages of sodium-ion technology is its use of widely available and inexpensive sodium resources, which reduces reliance on often constrained lithium supply chains. The chemistry has therefore emerged as a promising option for large-scale energy storage, where cost, resource availability, and operational reliability are critical factors.

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A collaboration between Chinese company Pangoo Power and the Ningbo Institute of Materials Technology and Engineering has resulted in a new axial flux motor platform built around a permanent-magnet material developed specifically for this motor architecture. 

According to the developers, the material improves magnetic energy performance, high-temperature stability, and mechanical strength while remaining suitable for large-scale manufacturing. The technology is drawing increasing interest because axial flux motors are fundamentally different from conventional radial-flux designs. Instead of directing magnetic flux outward from the center, axial flux motors channel it parallel to the shaft. 

This disc-shaped configuration reduces the motor’s overall length and enables torque to be generated closer to the outer edge, helping deliver higher torque and power density while lowering weight – which are key advantages for electric vehicles, humanoid robots, and emerging electric aircraft.

Modern materials revive a centuries-old motor design

Although axial flux motors are often viewed as a cutting-edge technology, the concept traces its origins to some of the earliest electric motor experiments conducted by Michael Faraday in the 19th century. For decades, however, the design remained largely impractical due to limitations in magnetic materials, manufacturing precision, and power control systems. 

Recent advances in permanent magnets, power electronics, and high-precision production techniques have changed that equation, enabling engineers to revisit the architecture and unlock performance levels that were previously difficult to achieve in commercial applications, CarNewsChina writes.

According to Chinese researchers, axial flux motor designs can cut both weight and axial length by roughly 50% compared with conventional motors that deliver comparable output. This reduction in size and mass makes the architecture especially attractive for electric vehicle applications, where drivetrain compactness is a critical design constraint. 

By shrinking the motor footprint, manufacturers can free up valuable chassis space, improve overall packaging efficiency, and potentially enhance vehicle performance and range through better system integration.

Breakthrough material enhances high-load motor operation

Recent engineering work on the new magnet material focuses on overcoming several persistent barriers to wider axial flux motor adoption, with researchers fine-tuning magnetic formulations, engineered more controlled microstructures, and increased resistance to high temperatures in order to limit demagnetisation during sustained high-speed and high-load operation. 

These improvements are critical for maintaining stable performance under demanding conditions, where thermal stress and magnetic degradation have historically constrained efficiency and long-term reliability. The finished production-oriented motor is reported to deliver a power density of 25.73 kW/kg while operating at speeds above 18,000 rpm. Researchers note this combination of high rotational speed and high power output could support demanding electric vehicle use cases, including sustained highway cruising and frequent hard acceleration.

These results come as Chinese automakers continue to rapidly advance electric motor technology across multiple design paths. Xiaomi Auto recently revealed that its Xiaomi YU7 GT will use the upgraded HyperEngine V8S EVO powertrain, an evolution of its earlier V8S system. The motor is capable of reaching up to 28,000 rpm and incorporates a self-developed silicon carbide (SiC) power module that increases output by 5.9%. Xiaomi also highlighted the use of 0.15 mm ultra-thin silicon steel laminations and a reported peak efficiency of 98.38%.

Recent developments in China’s electric drivetrain sector also highlight a broader push toward higher-output and more diversified motor architectures. BYD has introduced a 240 kW traction motor that is increasingly making its way into lower-priced electric vehicle segments, reflecting a trend toward more powerful drivetrains at accessible price points.

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