NASA reports that scientists found evidence that a region of northern Mars called Arabia Terra "experienced thousands of ‘super eruptions,’ the biggest volcanic eruptions known, over a 500-million-year period." These eruptions occurred "about 4 billion years ago," repeatedly spewing huge amounts of gas and ash into the atmosphere. The article notes that these super eruptions are the most violent volcanic explosions known and that the team calculated thousands of such events from the preserved ash layers.

NASA describes Mars as a planet with "extinct volcanoes" and notes that its volcanoes, impact craters, crustal movement, and atmospheric conditions have shaped its landscape over many years. The page highlights that Olympus Mons on Mars is the largest volcano in the solar system, indicating extensive volcanic activity in the planet’s past. It also characterizes present‑day Mars as a "dusty, cold, desert world with a very thin atmosphere," reflecting a geologically less active planet compared to its earlier history.

In describing why ancient rocks are important, NASA notes that "the oldest rocks on Mars record a time when the planet was more geologically and volcanically active, with flowing water on its surface." The agency contrasts this with Mars today, explaining that the planet is now much colder and drier, with a thin atmosphere and with most volcanic activity having ceased long ago.

The work confirms previous findings by others that **volcanism was continuous throughout Martian geologic history until about one to two hundred million years ago**. The final volcanic events were not synchronous across the planet, and **the latest large-scale caldera activity ended about 150 million years ago in the Tharsis province**. Nevertheless, **large-scale major volcanic activity on Mars has finished**.

“Mars has two major centers of volcanic activity: **Tharsis and Elysium**… While **most of the rise was emplaced by the end of the Noachian** and the large volcanic shields in the Hesperian, the region has **remained volcanically active for most of the planet’s history**, and as recently as **2.4 million years ago**… Elysium likewise shows evidence for **billions of years of volcanic activity**.” This indicates very large-volume construction early (Noachian–Hesperian) with lower-level activity continuing into the very recent past.

The article reports “young lava flows in **Elysium Planitia**” with model ages of only “**several million years**,” indicating that Mars is **not completely volcanically dead today**. However, the authors stress that these flows are **small in areal extent and volume** compared with the enormous volcanic constructs built earlier in Mars’ history, such as the Tharsis rise and Elysium Mons, which formed largely in the Noachian and Hesperian. The study therefore implies that **recent activity is minor compared with the much more voluminous early volcanism.**

The chapter states that “**volcanism represents a dominant geologic process throughout much of Martian history**,” and that “the largest concentration of Martian volcanoes occurs in the **Tharsis region**.” It explains that “substantial outpourings of plains-forming lava flows… were significant events during both the **Hesperian and Amazonian epochs**,” with “a stacked sequence” of flows around Tharsis and Elysium. By contrasting early, regionally extensive plains-forming eruptions with more localized and younger flows, the review implies that **early Mars experienced much larger-scale volcanic construction than is observed today.**

The USGS description notes that “The **volcanic activity** was associated with episodes of channel formation, faulting, and apparent volcano/ground-ice modifications of some areas.” It characterizes Elysium as a “**volcanic rise**” built by numerous lava flows and related features. The geologic map shows most units as Hesperian and Amazonian in age, documenting that **large volcanic construction occurred earlier in Martian history**, with only minor very young units suggesting greatly reduced recent activity.

EarthSky summarizes 2024 research on ancient volcanism, noting that "Mars was certainly highly volcanically active in the past" as shown by its numerous large volcanoes on the Tharsis bulge, including Olympus Mons. The article says that, although Mars’ volcanoes "no longer emit lava or ash," there is evidence for "some residual volcanic activity" underground and for geologically young lava deposits at Cerberus Fossae, but it emphasizes that this active period was primarily in the planet’s distant past when early Mars was a volcanically active world.

Summarizing crater-count work on Elysium, the article states: “The flows and crater counts show that **Elysium underwent a major peak of volcanic activity centered about 2.2 billion years ago. Thereafter, the activity gradually waned**, with several smaller peaks extending to quite recent times.” It adds that some of the youngest surfaces are “**younger than 100 million years**.” This supports a picture where **Elysium’s volcanism was far more intense earlier, with only low-level or episodic activity persisting into recent geologic times.**

It's clear that Mars has seen **much volcanic activity in the past**. Ages estimated by the number of impact craters seen on lava flows go as low as a **few million years**. Perhaps Martian volcanic activity has ended permanently. However, it's also possible that we are simply seeing Mars at a geologically quiet moment, and activity may resume any time. Scientists think that **when Mars was young, explosive eruptions were more common than in recent eras**.

Enormous amounts of lava have erupted from numerous fissures **as recently as one million years ago**, blanketing an area almost as large as Alaska and interacting with water in and under the surface. Although no volcanic activity has so far been observed on Mars, "Elysium Planitia was volcanically much more active than previously thought and **might even still be volcanically alive today**," said Voigt. Hamilton added that the study provides "the best estimate of Mars' young volcanic activity for about the past **120 million years**."

Reporting on research in Nature Astronomy, Space.com writes that "Early Mars may have been more tectonically and volcanically active than previously thought." Evidence of tectonic and volcanic activity around 4 billion years ago comes from 63 newly identified examples of various volcanoes in the Eridania region, including volcanic domes, stratovolcanoes, pyroclastic shields, and caldera complexes. The article contrasts this with today, stating: "Unlike Earth today, modern-day Mars has little to no volcanic or tectonic activity," and that about half of Mars’ surface is older than 3.5 billion years, suggesting limited crustal recycling.

Arizona State University describes new Nature Communications work showing that powerful volcanic eruptions "were common in Mars’ early history" and could have released massive pulses of water vapor, altering climate and depositing meters‑thick ice in equatorial regions. The article notes that volcanic activity "may have created and preserved water-rich environments far from the poles — possibly for billions of years," indicating that long‑lasting volcanism was a major driver of early Martian environmental conditions.

This conference abstract describes Elysium’s development: “Recent work indicates that isostatic uplift of **Tharsis**, loading by **Elysium Mons**, and flexural uplift of the Elysium rise produced the stresses which controlled the locations of vents and grabens.” It discusses “**episodic eruptions over an extended period**” and uses crater counts to show that most construction occurred in the past, with **decreasing eruption rates toward the present**. The analysis portrays Elysium as having a long but waning volcanic history, more vigorous in earlier epochs than today.

An EGU outreach article on Martian volcanoes explains that most large volcanoes on Mars formed more than 3 billion years ago, during a time when the planet’s interior was hotter and magmatism was widespread. It states that "volcanic activity decreased with time" and that although some eruptions may have occurred in the last few hundred million years, the overall level of activity today is much lower than in the Noachian and Hesperian periods when major volcanic provinces were constructed.

EarthSky summarizes a 2026 study of the Pavonis Mons volcanic system, stating that researchers found "the most recent volcanoes on Mars were more active and complex than previously thought." The study shows that these volcanoes erupted many times and were fed by "long-lasting magma systems" beneath the surface. The authors are quoted: "Our results show that even during Mars’ most recent volcanic period, magma systems beneath the surface remained active and complex," although the Pavonis Mons system is now extinct or dormant.

Planetary science textbooks and reviews broadly agree that **Mars experienced its most intense and widespread volcanism in the Noachian and Hesperian periods (roughly >3.0–3.5 billion years ago)**, when large volcanic provinces such as Tharsis and circum-Hellas were constructed. In the subsequent Amazonian period, volcanic output **declined both in areal extent and volume**, with only localized eruptions occurring sporadically up to a few million years ago, so that modern Mars is considered **largely volcanically dormant compared with its early history**.