New Zealand entered 2026 under the growing influence of an active solar cycle, with one of the strongest solar radiation storms in more than two decades already under close watch by national agencies. Space weather specialists warn that while direct health risks to people are low, the potential impact on electricity networks, satellite infrastructure, aviation and digital services is significant, especially for a technology‑reliant country like New Zealand. This blog explores how solar storms work, what they could do to New Zealand’s technology systems in 2026, and how well the country is prepared.
Understanding Solar Storms and Space Weather
Solar storms are disturbances generated by the Sun, mainly through solar flares and coronal mass ejections (CMEs) that hurl charged particles and magnetic fields into space. When these clouds of plasma and radiation interact with Earth’s magnetosphere, they create geomagnetic storms that can induce electrical currents in long conductors and interfere with radio communications and satellite electronics.
Space weather is tracked globally by scientific agencies such as NASA and the US National Oceanic and Atmospheric Administration (NOAA), which have confirmed that the current 11‑year solar cycle is approaching its maximum, increasing both the frequency and severity of solar eruptions through 2025–2026. For New Zealand, located at mid to high geomagnetic latitudes and with a long, interconnected transmission network, these conditions translate into higher‑than‑usual risks of geomagnetically induced currents (GICs) in its grid and more frequent disturbances to navigation and communication systems.
New Zealand’s Growing Exposure in 2026
New Zealand’s exposure to space weather impacts has increased over the past decade because its economy and public services depend ever more heavily on satellite‑enabled technology and reliable electricity. Mobile and broadband penetration exceeds 90 percent of the population, and GPS‑based timing and positioning is integrated into everything from logistics and agriculture to banking transactions and emergency services. At the same time, the national grid relies on long high‑voltage transmission lines connecting distant hydro schemes and wind farms to urban load centres such as Auckland, Wellington and Christchurch, making it more vulnerable to induced currents during strong geomagnetic storms.
In early 2026, national authorities confirmed they were monitoring what NOAA classified as an S4 severe solar radiation storm, the most intense event recorded in more than 20 years. While initial assessments indicated no major disruption to New Zealand consumers, the episode highlighted how quickly conditions can change and why grid owners and emergency planners now treat space weather as a systemic risk rather than a niche scientific curiosity.
How Solar Radiation Affects Technology
Solar storms affect technology in two main ways: through charged particles and through disturbed magnetic fields. High‑energy protons from solar radiation storms can penetrate satellite shielding and damage electronic components or cause bit flips in memory, potentially resetting systems or degrading performance. At the same time, changes in Earth’s magnetic field during a geomagnetic storm induce quasi‑DC currents in long conductors such as power lines, pipelines and undersea cables. These currents can stress transformers, cause overheating, and lead to voltage instability or even blackouts if not properly managed.
Radio communications are also highly sensitive to solar activity. When X‑class flares hit the upper atmosphere, they can ionise regions of the ionosphere, absorbing high‑frequency (HF) radio signals used by aircraft and maritime operators and distorting the propagation of other bands. For New Zealand, which depends on both satellite and HF communications for aviation in the Southern Ocean and remote maritime zones, these disturbances can degrade safety margins and force operational changes such as route adjustments, altitude shifts or communication method changes.
The 2026 Severe Solar Radiation Storm
In January 2026, space‑weather centres reported an S4‑class solar radiation event, a level categorised as “severe” on the standard five‑step scale from S1 (minor) to S5 (extreme). An S4 storm implies a flux of high‑energy protons strong enough to significantly raise radiation exposure at aviation altitudes on polar and high‑latitude routes and to pose a serious risk to satellite electronics, particularly for satellites in polar orbits and those with older or less robust shielding.
Forecast models suggested that while New Zealand would not experience the same level of radiation as polar regions, the geomagnetic disturbances would still be strong enough to generate geomagnetically induced currents in its grid. Transmission system operators reported measurable GICs in their network during the storm’s arrival, although levels remained below thresholds requiring emergency mitigation actions. This episode demonstrated both the reality of the threat and the effectiveness of existing monitoring and contingency frameworks, while also underlining that a slightly stronger or differently oriented CME could have had far more disruptive consequences.
Radiation Risks for Aviation over New Zealand
One of the most critical concerns in 2026 is radiation exposure for aircraft flying at cruising altitudes, particularly on long‑haul routes that pass through higher latitudes south of New Zealand. At normal times, pilots and flight crew already receive more ionising radiation than most ground‑based workers due to cosmic rays at high altitude, but solar radiation storms can temporarily increase dose rates several‑fold on affected routes.
During a severe event like an S4 storm, airlines may alter flight paths, reduce cruising altitudes or delay flights to limit crew and passenger exposure. These measures reduce dose rates but come with fuel penalties and schedule disruptions. Aviation authorities rely on real‑time solar radiation alerts and dose‑rate modelling to decide when such measures are necessary. Even if individual passengers face only a modest increase in short‑term risk, frequent fliers, pilots and crew represent a group where occupational exposure needs careful management, particularly if solar maximum brings multiple strong events in a single year.
Threats to Satellites, GPS and Communications
New Zealand’s connectivity to the global digital infrastructure depends heavily on satellites for services ranging from broadcast television and weather observation to GPS timing, remote sensing for agriculture and fisheries, and backup communications for disaster response. Solar storms can disrupt all of these layers.
Geomagnetic storms can disturb the ionosphere, causing GPS signals to refract unpredictably and degrading positioning accuracy from the usual metre‑scale to tens of metres or worse during intense events. This can affect precision agriculture, surveying, autonomous machinery, and timing‑dependent financial transactions that rely on GPS‑disciplined clocks. At the same time, satellite operators may place spacecraft into safe modes, alter orbital manoeuvres, or temporarily suspend sensitive operations to protect electronics, leading to service interruptions or reduced data quality. For New Zealand businesses that depend on satellite imagery and connectivity, even short outages can disrupt logistics, fisheries management and real‑time monitoring of remote infrastructure.
Impacts on the Electricity Grid and Energy Sector
The electricity transmission system is among the most vulnerable pieces of infrastructure during strong solar storms because long power lines act as antennas for induced currents. When geomagnetically induced currents flow through transformers, they can cause partial saturation of cores, generate harmonics, and heat internal components, potentially leading to accelerated ageing or catastrophic failure if the stress is severe and prolonged.
New Zealand’s transmission operator has been enhancing its capacity to monitor and respond to GICs, installing sensors and developing operating procedures to reconfigure the grid during major storms. These measures include temporarily switching out certain lines, adjusting power flows, or altering the operating state of transformers in high‑risk regions to reduce the likelihood of damage. Even so, a once‑in‑a‑century level geomagnetic storm comparable to the 1859 Carrington Event could still pose a serious threat, with modelling studies suggesting that large regions could experience voltage collapse or transformer failures if mitigation strategies are not executed rapidly and effectively.
Wider Digital and Transport Disruption
Beyond the grid and satellites, the wider digital and transport ecosystem in New Zealand is also exposed to solar‑storm‑related disruptions. Mobile networks can experience interference if satellite backhaul links or timing signals degrade, and some microwave and radio links may see increased error rates or brief outages during strong events. While fibre‑optic cables themselves are immune to geomagnetically induced currents, the repeaters and power‑supply equipment that support undersea and terrestrial cables can still be affected indirectly through grid instability or surges.
Transport systems that rely on GPS for navigation, timing and tracking could also face challenges. Maritime traffic around New Zealand uses GPS and satellite communications extensively, and aviation depends on satellite navigation and ground‑based radio systems that can be degraded by solar storms. Even road transport is increasingly dependent on GNSS for fleet management and emerging driver‑assistance systems. Short‑term disruptions might manifest as inaccurate positioning, delayed data feeds or the need to revert to older navigation methods and contingency procedures.
Key Statistics on Solar Storms and Technology
To better understand the scale of potential impacts in 2026, it is useful to consider some key statistics and benchmarks drawn from international and New Zealand research on space weather and infrastructure vulnerability. These figures provide context for how often major events occur and what kinds of disruptions are considered plausible by experts.
| Indicator | Typical or Estimated Value | Relevance to New Zealand in 2026 |
|---|---|---|
| Solar cycle length | Around 11 years from minimum to maximum | New Zealand is currently near solar maximum, increasing the frequency of disruptive events. |
| Travel time of CMEs from Sun to Earth | Roughly 12 hours to 3 days depending on speed | Emergency managers have limited warning time to implement grid and aviation mitigation plans. |
| Duration of geomagnetic storm effects at Earth | From several hours to multiple days | Prolonged storms can stress power equipment and force repeated operational changes. |
| Classification of January 2026 radiation storm | S4 severe on a five‑step scale from S1 to S5 | A severe event illustrates the potential for increased aviation radiation and satellite risk. |
| Historical record of large geomagnetic events in New Zealand | Documented past storms have caused measurable GICs and limited infrastructure impacts | Confirms that New Zealand has already experienced non‑trivial space‑weather effects. |
While these numbers may seem abstract, they guide decision‑makers when assessing the likelihood of rare but high‑impact events and when justifying investments in monitoring, grid hardening and emergency planning.
Government and Industry Preparedness in New Zealand
Recognising these risks, New Zealand’s National Emergency Management Agency has developed a dedicated space‑weather response plan to coordinate government, utilities, telecommunications providers and transport agencies. This framework outlines how alerts will be disseminated, when to activate crisis centres, and what thresholds should trigger concrete actions such as altering grid configurations, adjusting aviation routes or issuing public advisory messages.
The plan is informed by simulations of extreme scenarios, including “G5”‑class geomagnetic storms, carried out in coordination with power companies and communication providers. These exercises have highlighted the importance of maintaining backup systems, such as robust AM radio capability that is less vulnerable to some forms of interference, and ensuring that critical services like emergency communications, hospitals and water treatment plants can operate on backup power if necessary. Industry partners increasingly view space weather as part of their broader resilience and cybersecurity agenda rather than as a purely scientific issue.
Forecast for 2026: Disruption Scenarios
Given the current solar‑cycle phase and recent S4 activity, the remainder of 2026 is expected to feature a higher‑than‑average number of moderate to strong space‑weather events, with a non‑negligible chance of at least one severe geomagnetic storm capable of causing noticeable disruptions in New Zealand. Day‑to‑day impacts will likely be modest: occasional GPS positioning errors, minor radio blackouts, and small operational adjustments by grid and aviation operators.
However, a worst‑case scenario would involve a fast, Earth‑directed coronal mass ejection aligned so that its magnetic field couples strongly with Earth’s. In such circumstances, New Zealand could face transformer‑damaging GICs, regional power outages, extended degradation of satellite services, flight diversions and potential communication blackspots. While this type of event remains low‑probability in any given year, risk assessments classify it as high‑impact, and many of the preparedness measures now in place are specifically designed to reduce the consequences if such an event occurred in 2026 or beyond.
Building Resilience and Mitigation Strategies
To reduce vulnerability to solar storms, New Zealand can strengthen both technical defences and institutional preparedness. On the technical side, installing more GIC monitoring devices on transmission lines and transformers allows operators to see in real time how geomagnetic disturbances are affecting the grid. Investing in transformers with improved tolerance to DC currents, segmenting long lines, and enhancing surge‑protection systems all reduce the risk of catastrophic equipment failure.
On the institutional side, regular drills involving energy, telecommunications, aviation and emergency agencies ensure that alerts are acted on quickly and coherently. Public communication is another vital tool, helping businesses and citizens understand why flights might be diverted, why GPS readings seem off, or why authorities are urging prudent energy use during a solar storm. Improved forecasting from global and regional space‑weather centres gives New Zealand more lead time to prepare, but effective resilience ultimately depends on how quickly and coherently organisations respond when the alerts arrive.
Opportunities Amid the Risks
Despite the potential for disruption, active solar cycles also drive scientific and technological innovation. New Zealand’s research institutions and meteorological services can leverage the current solar maximum to refine local models of geomagnetically induced currents and ionospheric disturbances, improving future forecasts and designs for infrastructure hardening. The need for robust systems spurs investment in more resilient grid architectures, diversified communication channels and better backup power solutions, benefitting society even during non‑storm periods.
There is also a public‑engagement side: strong geomagnetic storms can produce spectacular auroras visible at unusually low latitudes, offering an opportunity to raise awareness about space weather and its impacts. By framing solar storms not just as threats but as natural phenomena that can be studied, anticipated and managed, New Zealand can build a culture of resilience that treats space weather as another manageable hazard alongside earthquakes, floods and volcanic eruptions.
In 2026, the Sun is reminding New Zealand that technology and nature are deeply intertwined. Solar storms will continue to pose radiation risks and disruption threats, but with vigilant monitoring, coordinated planning and ongoing investment in resilient infrastructure, the country can significantly reduce the chance that a burst of energy 150 million kilometres away turns into a major technological crisis at home.
Nirti Singh is a news writer and digital content contributor at KorakoSpecklePark, covering key stories and regional developments across New Zealand and Australia. Her work focuses on clear, fact-based reporting, ensuring readers receive accurate and timely information.