volcanic tremor

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A powerful 6.1-magnitude earthquake jolted off Indonesia's Sumatra island on Tuesday, a region situated on a major tectonic collision zone. This seismic activity is characteristic of the Pacific "Ring of Fire." While a previous 6.3-magnitude quake in November 2025 near Aceh caused no tsunami, the region remains prone to such events due to plate convergence.

The Met Office has issued a new magma warning in Iceland as the threat of a volcanic eruption persists. Authorities have reported 'magma intrusion' and the possibility of magma emerging. Iceland declared a state of emergency after experiencing 800 earthquakes in 14 hours, causing damage to roads and forcing residents to evacuate. The danger zone is centered around the fishing town of Grindavik, which is expected to be wiped out by the eruption. Seismic activity has reduced but the nation remains on high alert for an eruption.

Around 4,000 residents of Grindavik, a fishing town in Iceland were evacuated after some 900 earthquakes jolted southern Iceland, raising fear of a volcanic eruption in the past week. The residents recounted being swept from their houses in the wee hours of Saturday amid tremors that fractured roadways and caused structural damage to the buildings. As tens of thousands of tremors were felt in the recent weeks, authorities are concerned that molten rock might rise to the surface of the ground and strike a geothermal power plant and a coastal town.

Mount Etna, Europe's tallest and most active volcano, erupted on February 12, 2025, sending lava flows and ash clouds into the sky. Local authorities are concerned about the dense ash cloud's impact on air traffic and local infrastructure, and scientists continue to analyze seismic data for future predictions.

Since the 1960s, scientists have been intrigued by a mysterious seismic pulse occurring every 26 seconds. Originating in the Gulf of Guinea, this consistent tremor defies typical seismic activity. While theories range from ocean wave resonance to volcanic activity near São Tomé, the exact cause of this 'Earth's heartbeat' remains an unsolved enigma, captivating geophysicists worldwide.

Iceland's Blue Lagoon geothermal spa has temporarily closed due to fears of a potential volcanic eruption. The closure comes after thousands of recent tremors in the surrounding area on the Reykjanes peninsula. The spa cited disruptions to the guest experience and strain on employees as reasons for the closure. Iceland's Met Office has recorded 23,000 small earthquakes since late October and noted an accumulation of magma underground. While there are currently no clear signs of an eruption, seismic activity is expected to continue.

According to a Wall Street Journal report, Pozzuoli has felt over 2,500 tremors since August 2023. However, the occurrence of a 4.2 magnitude tremor on September 27, the most powerful quake to shake the volcanic field in over four decades, has ignited concerns among experts that a "seismic crisis" could be unfolding, marking the first such event since the early 1980s. Pozzuoli lies on top of a slumbering supervolcano known as the Campi Flegrei. The Campi Flegrei is a large volcanic area that consists of many craters and calderas.

There had not been any reports of missing people after the deadly eruption on Tuesday, which sent rocks and ash tumbling down the snow-covered slope of the volcano towards a ski resort below.

On Thursday, a significant 6.3-magnitude earthquake struck near Sumatra island, close to Aceh province, with its epicenter just 10 km underground. Though locals experienced the tremors intensely, officials assured that there is no risk of a tsunami. This incident serves as a stark reminder of Indonesia's precarious location along the notorious 'Ring of Fire,' where tectonic movements frequently occur.

A 4.4 magnitude earthquake rattled the volcanic Campi Flegrei area near Naples, Italy, triggering a "major" quake swarm and causing widespread concern. While there were no immediate reports of damage or injuries, the Naples metro and cable car were temporarily suspended as a precaution.

Some 900 earthquakes hit southern Iceland on Monday, authorities said, adding to tens of thousands of tremors that rattled the region in recent weeks as the country braces for what could become a significant volcanic eruption. Almost 4,000 people were evacuated over the weekend as authorities feared that molten rock would rise to the surface of the earth and potentially hit a coastal town and a geothermal power station. "We have this tremendous uncertainty now; will there be an eruption and if so, what sort of damage will occur," said Matthew James Roberts,

A study by NGRI reveals that even tiny stresses can cause seismic triggering in Arunachal Pradesh. The researchers have identified triggered seismicity in the form of microearthquakes and non-volcanic tremors during remote mainshocks. The region, located in north-east India, is vulnerable to seismic activities due to its location at the collision zone of tectonic plates. The study highlights the complexity of faults, fractures, and geological characteristics in the area. Global studies suggest that triggering can lead to significant earthquakes with magnitudes over 5.5.

Small tsunami waves impacted Japan's Izu and Ogasawara islands following a 5.8 magnitude offshore earthquake, potentially linked to volcanic activity. The Japan Meteorological Agency issued a tsunami advisory, later lifting it after three hours with no injuries or damage reported. Seismologists believe undersea volcanic activity could have caused the seabed shifts leading to the waves.