What kind of eruption could happen on Tenerife?
Since February 2026, Teide has been more restless than usual. There have been earthquake swarms, some with hundreds of microquakes in a few hours, and that has filled headlines.
The question that follows is almost never "is it going to erupt?". It is a more specific and more useful one: if it ever does, what kind of eruption would it be?
It is worth answering, because eruptions are not all alike, and the difference between them decides nearly everything else.
First, where things stand
The Canarian volcanic traffic light is green, and has been throughout 2026. Green means every daily activity can go ahead entirely as normal.
The scientific committee of the Canarian volcanic emergency plan has ruled out any imminent or short term eruption risk on Tenerife. Spain's national geographic institute describes the system as being in active calm: it moves more than it used to, but within what a living volcanic system does.
Tenerife has more than a hundred stations and sampling points monitoring seismicity, ground deformation and gases in real time. The committee meets to reassess every three months.
This paragraph describes the situation in September 2026. The traffic light can change, and the source to check is always the official one, never a guide.
The real question: what would you see?
The island's history has already answered several times, and all the answers resemble each other.
Tenerife's historical eruptions have been fissure eruptions with basaltic lava: a crack opens on a flank, relatively fluid lava comes out, there are fire fountains, slow moving flows and a modest ash column. They last weeks or months.
The list is short and well known:
Siete Fuentes, Fasnia and Arafo, 1704 and 1705, three vents within a few months.
Garachico, 1706, the one that changed the town's history by burying its harbour.
Chahorra, 1798, on the flank at the Narices del Teide.
Chinyero, 1909, the island's most recent, and today a walking trail.
None of them was a catastrophic explosion. They destroyed ground, they were preceded by days of earthquakes, and people were able to get out of the way.
Why Teide is a special case, but not the likely one
Precision matters here, because this is where everything tends to get mixed up.
Teide is not just another basaltic volcano: its magma can be phonolitic, which is far more viscous. Viscous magma traps gas, and trapped gas is what produces explosive eruptions.
So the explosive scenario does exist on Tenerife, and that is exactly why the system is watched as closely as it is.
But it is not the scenario the island's recent history has produced. The eruptions of the last few centuries came out of the flanks, not the summit, and they were of the fluid kind.
How it differs from La Palma in 2021
The comparison is unavoidable, and it is useful, with one qualification.
The La Palma volcano was a basaltic fissure eruption: a crack on the ridge, lava running down towards the sea, ash, and almost three months of activity. That one is a reasonable model for what could happen on a flank of Tenerife.
The difference lies less in the volcano than in the ground: the area around Teide is far more populated and built up than the Aridane valley. What changes the outcome is not the type of lava, but what stands in its path.
What you should actually do
Very little, and that is the good news.
Small earthquakes are not an alarm. They can be felt without meaning that anything is about to happen. The emergency authority itself has warned that they might be noticeable.
The source is the official one, and only that. The geographic institute and the Canarian emergency plan publish the status. An alarmist video is not a source.
If the traffic light ever changes, you will know. This is not a silent system: there is a protocol, a public warning and phased measures.
For any emergency, dial 112.
And something that often surprises people: the best way to understand this is not to read but to go. Our island by island look at Canarian volcanoes puts the whole picture in place, and the Chinyero trail lets you walk across the island's most recent lava flow, from 1909.
If you also want to go all the way up, the permit and cable car guide explains the paperwork. And before any route, what you should know about safety.
Sources
Instituto Geográfico Nacional, volcanic monitoring in the Canaries: state of active calm, station network on Tenerife.
PEVOLCA, the Canarian special plan for volcanic risk: green traffic light and ruling out a short term eruption, quarterly reassessment (statements from 2026).
