WASHINGTON — New satellite images of Iran show the country burying tunnel entrances at a key nuclear complex, reinforcing an underground site near Natanz and concealing a rebuilt structure at the Parchin military compound, as U.S. officials press for a nuclear deal and warn that military action remains a possibility, Feb. 19, 2026.
Analysts said the new fortifications visible in the satellite imagery appear aimed at limiting the impact of airstrikes and slowing any ground operation that might try to reach sensitive nuclear material or missile equipment.
A Reuters analysis of recent commercial satellite imagery described stepped-up construction at military, nuclear and missile facilities that have been central to U.S.-Iran tensions and, in some cases, were damaged during fighting last year.
What Iran satellite images show at Parchin, Isfahan and Natanz
Parchin: About 30 kilometers (20 miles) southeast of Tehran, the Parchin military complex is one of Iran’s most sensitive defense sites. The latest Iran satellite images show a rectangular building damaged in a reported Israeli strike in October 2024, repaired in the weeks that followed, then gradually covered until it largely disappeared from view by mid-February. Analysts who reviewed the imagery said the site appears to be encased in concrete and buried under soil — a form of “passive defense” intended to conceal it from overhead surveillance and provide added protection against future strikes.
Western intelligence agencies have for years alleged Parchin hosted experiments relevant to nuclear weapons development, claims Iran has rejected. The Institute for Science and International Security, a Washington-based nonproliferation group, has identified the rebuilt structure as “Taleghan 2,” and previously said satellite imagery suggested the building may have housed a long cylindrical chamber resembling a high-explosives containment vessel. Such vessels can be relevant to nuclear weapons research, though they can also be used for conventional weapons work.
Isfahan: At Iran’s Isfahan nuclear complex — one of the sites struck during the 2025 attacks on Iran’s nuclear infrastructure — the Iran satellite images show three tunnel entrances that have been backfilled with soil. In a Feb. 9 update, the Institute for Science and International Security said the entrances were “completely buried” after a third portal was filled in. The group said the step could help “dampen” an airstrike and make ground access more difficult if foreign forces attempted to reach highly enriched uranium believed by diplomats to have been stored in the underground complex.
Natanz and “Pickaxe Mountain”: Near Natanz, home to major uranium enrichment facilities, Iran satellite images show ongoing work to harden two entrances to an underground tunnel complex under a nearby mountain. The mountain, known as Kolang Gaz La, has been dubbed “Pickaxe Mountain” in open-source reporting. Analysts described heavy equipment at the site, including dump trucks and cement mixers, consistent with efforts to reinforce the portals and surrounding terrain. The purpose of the underground complex is not publicly known.
Iran satellite images show repairs at missile bases hit in the 2025 war
The satellite imagery also shows reconstruction and cleanup at missile-related facilities damaged during Israel’s 12-day war with Iran in 2025. Analysts cited ongoing work at the Shiraz South missile base, roughly 10 kilometers (6 miles) south of the city, and repairs to roofing and other structures at a missile base north of Qom.
Imagery analysts cautioned that visible reconstruction does not necessarily indicate the full restoration of underground storage or launch infrastructure — and that some of the most important assets at missile sites can be moved, dispersed or stored in hardened tunnels that are difficult to assess from overhead imagery alone.
Why Iran satellite images matter as U.S.-Iran negotiations intensify
The fortification push comes as the U.S. and Iran try again to narrow gaps over Tehran’s nuclear program. Iran says its program is peaceful, but it previously enriched uranium far beyond levels needed for civilian power generation. Iran’s foreign minister said negotiators reached a general understanding on “guiding principles” in indirect talks in Geneva, but said a deal was not imminent, according to a Reuters report on the Geneva talks. Iran has said it will discuss limits on its nuclear program in exchange for sanctions relief, but has resisted U.S. efforts to expand the agenda to Iran’s missile stockpile.
For Washington and its allies, the imagery also raises questions about what remains underground after the 2025 strikes and what may have been moved before bombs fell. The Arms Control Association’s running assessment of Iran’s nuclear facilities noted that early, low-confidence intelligence estimates suggested the strikes damaged key sites but may have set the program back by months rather than ending it outright, while other assessments and political statements argued the damage was far more severe. The group also noted that inspectors were no longer accessing Iran’s nuclear sites after the attacks, complicating outside verification.
That uncertainty is one reason satellite monitoring has become more consequential: even high-resolution Iran satellite images cannot confirm what is stored inside a sealed tunnel, whether centrifuges are operational or whether nuclear material has been relocated.
A pattern years in the making
While the latest Iran satellite images focus on postwar repairs and new fortifications, open-source imagery has shaped public debates about Iran’s nuclear posture for years. In April 2025, Reuters reported that satellite imagery showed Iran erecting a massive security perimeter around two deeply buried tunnel complexes under Mount Kolang Gaz La near Natanz, amid U.S. and Israeli threats of attack.
A decade earlier, a 2012 Reuters factbox described how satellite images published by a U.S. security institute fueled allegations that Iran was trying to sanitize parts of the Parchin military site to destroy evidence of weapons-related research.
And in 2014, Reuters reported that Israel alleged Parchin had been used for tests of technology it said would be relevant only to detonating a nuclear weapon — an accusation Tehran rejected as fabricated.
What comes next
Diplomacy and verification will determine whether the newest Iran satellite images become a footnote in an uneasy negotiation or a sign of deeper confrontation ahead. Analysts say Iran’s visible investment in burying tunnel entrances and reinforcing key sites suggests Tehran expects the threat of renewed strikes — and may be trying to buy time and protection as talks continue.
For the U.S. and international inspectors, the challenge is that Iran satellite images can show construction and concealment, but they cannot answer the core questions about nuclear material, enrichment capacity and intent without access on the ground.
