Earthquakes

News about earthquakes. The stronger events are edited manually by the author, but a part of the quakes are automatically detected and posted by the usgs.

Campi Flegrei: Noticeable M3.2 Earthquake near Pozzuoli

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Renewed Seismic Swarm hits Campi Flegrei – Epicenter close to critical Tangenziale Highway

Last night, the Campi Flegrei caldera was once again shaken by a seismic swarm. The strongest event reached a magnitude of 3.2, with the hypocenter located about 2,700 meters deep—beneath the hydrothermal system. Two additional quakes, measuring M2.2 and M2.0, occurred just before and after the main shock. All three epicenters were located northeast of Solfatara, near the Tangenziale highway that connects Pozzuoli to Naples.

This highway is the region’s main evacuation route in the event of a volcanic eruption. It passes through tunnels beneath the caldera’s volcanic hills. A stronger earthquake—above magnitude 5—could seriously damage this critical infrastructure, significantly complicating any last-minute evacuation. Therefore, expanding evacuation capacity via the sea appears increasingly necessary.

The M3.2 tremor was widely felt in Pozzuoli and nearby areas. Many residents reported it on social media. One user expressed concern about potential damage to the ruins of Pompeii, where a similar quake last month caused a wall to collapse.

The latest swarm began at 23:00 UTC and included around 30 individual tremors. Recent hopes that seismic activity might be declining—based on a few quieter days—now seem premature. Past patterns suggest that calmer phases often precede more intense swarms. As long as ground uplift continues, seismic stress will keep building. Even temporary slowdowns in uplift, as seen in past years, are no indication that the unrest is ending.

Columbia: Earthquake Mw 6,3 on June 8

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Damage after earthquake in Colombia on June 8, 2025

A strong earthquake with a magnitude of 6.3 struck Colombia at 13:08 UTC (08:08 local time). According to the EMSC, the epicenter was located 23 km east of Medina, around 100 km east of the capital Bogotá. The hypocenter was only 9 km deep, which amplified the effects on the surface. Moderate damage was reported, including several buildings that collapsed near the epicenter. Social media images show destroyed houses, fallen façade parts, and cracks in roads and buildings. There have been no reports of fatalities so far, but panic reactions among the population have been reported.

The quake can be explained by Colombia’s complex tectonic setting. The Nazca and Caribbean Plates converge with the so-called North Andes Block. The earthquake occurred along the East Andean Fault Zone, a major fault in Colombia’s interior. Several aftershocks followed the main event.

Colombia is also volcanically active, with 14 volcanoes classified as potentially active, including Galeras, Nevado del Huila, and Nevado del Ruiz. The latter is located about 250 km from the epicenter and is currently erupting. Today, the VAAC reported ash clouds at 6,100 meters altitude. There is a possibility that the earthquake could influence the volcano and trigger a stronger eruption in the near future.

Seismic Unrest Near Santorini

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Earthquake Swarm at the Submarine Volcano Kolumbo close to Santorini

The region around the Greek volcanic island of Santorini remains seismically active. Over the past week, numerous earthquakes have occurred, particularly in the area of the submarine volcano Kolumbo. The strongest quake was recorded on January 25 with a magnitude of 3.6. Its hypocenter was at a depth of 11 kilometers near the coast of Thirasia, the western island of the Santorini archipelago. Tremors were also felt on Nea Kameni and Santorini itself.

In the past 24 hours, activity has continued with over 30 earthquakes, most with magnitudes in the 2.0 range. The deepest hypocenter was measured at 13.3 kilometers. In total, more than 70 quakes have been recorded over the past week. The latest swarm affected the Kolumbo volcano area, consisting of 19 tremors with hypocenters ranging between 5 and 21 kilometers in depth.

Whether these quakes are of tectonic origin or caused by the movement of magmatic fluids remains uncertain. Changes in stress due to ground uplift are also a possible explanation. However, no reports of ground deformation have been issued—likely due to a lack of underwater monitoring stations in the area. The ongoing seismic activity in the region requires continued observation.

Ethiopia: Another Earthquake Near Awash on 16.10.24

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Earthquake Mb 4.6 Shakes Volcano Region Near Awash in Ethiopia – Ground Uplift Detected

On the evening of October 16, a magnitude 4.6 earthquake occurred in the Awash region of Ethiopia near the Fentale volcano, and it was also felt in Addis Ababa. With a depth of about 10 kilometers, the earthquake may have been shallower, as the seismological monitoring in the region is imprecise. For weeks, numerous smaller tremors have been damaging infrastructure such as railways and buildings.

InSAR data shows a possible ground uplift of up to 30 centimeters, indicating magma intrusion close to Fentale volcano. Previous studies have shown that rhyolitic magma intrusions have occurred here before, which is unusual in this basalt-rich region. These intrusions were accompanied by strong earthquake swarms, similar to what is happening now. However, it is possible that the InSAR image reflects other effects, such as a high water level on the Awash River.

The Fentale volcano, dominated by a 5-kilometer-wide caldera, is both effusive and explosive, unlike most other volcanoes in the region. The tectonic activity is driven by the divergent boundary between the Somali Microplate and the African Plate. A phreatic eruption occurred last week in a thermal area near the volcano. It is possible that a volcanic eruption may follow.

Strong earthquake swarm on the Icelandic Reykjanes Peninsula

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In the past few days, there has been a significant earthquake swarm on the Icelandic Reykjanes Peninsula. More than 7,500 tremors were recorded. The strongest earthquake had a magnitude of 4.9. These earthquakes were concentrated in an area northwest of the Thorbjorn volcano, specifically beneath the Svartsengi geothermal power plant. A rapidly progressing ground uplift of 3 cm has now been observed, which is caused by a magma accumulation underground. The ground has also risen in the Fagradalsfjall volcano area. Scientists from the Icelandic Meteorological Office (IMO) anticipate a new eruption. The Volcano Observatory Notice for Aviation (VONA) alert status has been raised to “Yellow.”

The strongest earthquake of the uplifting phase has shaken Campi Flegrei

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Date: 27.09.23 | Time: 03:35:34 UTC | Location: 40.8170; 14.1560 | Depth: 2.9 km | Magnitude: 4.2

Tonight a moderate earthquake of magnitude 4.2 occurred beneath the southern Italian Caldera volcano Campi Flegrei. It was the strongest earthquake of the current uplift period, which began in 2005. The hypocenter was at a depth of 2900 m. The epicenter was located on the coast in the area of Via Napoli between the towns of Pozzuoli and Bagnoli. The Solfatara is approximately 1300 meters northwest of the epicenter. The earthquake occurred at 03:35:34 UTC (05:35:34 local time) and is likely to have awakened some residents from their sleep. There have been no reports of damage so far, although despite the moderate magnitude, some houses may have developed cracks, as the earthquake’s hypocenter was shallow.

Strong Earthquake Mw 6.9 Causes Casualties in Morocco

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Date 09/08/23 | Time: 22:11:00 UTC | 31.074; -8.477 | Depth: 10 km | Mw 6.9

A strong earthquake with a moment magnitude of 6.9 occurred last night near Agadir and Marrakesh. The earthquake occurred at 22:11:00 UTC. The quake caused significant destruction and has resulted in 632 fatalities and 329 injuries so far. The exact depth of the hypocenter varied depending on the source: EMSC reported a depth of 10 km, GFZ Potsdam measured 27 km, and USGS determined nearly 19 km. EMSC located the epicenter 60 km west-southwest of Oukaïmedene, in a remote region of the Atlas Mountains. There were severe damages, particularly in the mountain villages near the epicenter, where numerous buildings have completely collapsed. The search for victims is still ongoing, and in many areas, there have been power outages and communication disruptions. There is speculation that landslides may have occurred, and some communities could be isolated from the outside world.

Earthquake Mb 3.8 near Solfatara triggers swarm of earthquakes

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Date 09/07/23 | Time: 17:45:28 UTC | 40.83; 14.147 | Depth: 2.5 km | Mb 3.8

Yesterday, there was an earthquake in the Campi Flegrei Caldera with a magnitude of 3.8. The earthquake’s epicenter was at a depth of 2.5 km. The earthquake occurred near the northeastern crater rim of Solfatara, close to the thermal area of Piscarelli, and triggered an aftershock sequence with 30 subsequent earthquakes. These aftershocks mostly had low magnitudes in the microseismic range.

The main earthquake was felt in Pozzuoli and parts of Naples. EMSC received reports from people located 16 km away from the epicenter who felt the tremor. For those living closer, the earthquake was strong and frightening, but there are no reports of damage.

Moderate earthquake shakes Greek island Crete

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Date: 08/13/23 | Time: 07:49:32 UTC | Coordinates: 35.247 ; 23.878 | Depth: 10 km | Magnitude: 4.6

The Greek holiday island of Crete was shaken by a moderate earthquake with a magnitude of 4.6 this morning. The hypocenter was located at a depth of 10 km by the EMSC. This depth is often provided when it is certain that the earthquake occurred in shallow areas of the Earth’s crust, but the exact depth has not (yet) been determined. The epicenter was a few kilometers from the southwest coast and was located 18 km east-northeast of Palaióchora. The island’s capital, Heraklion, is 115 km away from the epicenter. Aftershocks can be expected.

Earthquake M 5.2 in Turkey

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Date: 10th August 2023 | Time: 17:48:00 UTC | Location: 38.267 ; 38.265 | Depth: 11 km | Magnitude: 5.2

Once again, an earthquake occurred along the East Anatolian Fault in southeastern Turkey. The moderate earthquake reached a magnitude of 5.2 on the Richter scale and had its hypocenter at a depth of 11 km. The epicenter was located about 10 km south-southwest of the town of Malatya. Local media report at least 23 injured individuals. The earthquake took place at 17:48:00 UTC, affecting a region that had already been severely impacted by the strong earthquake near Gaziantep. The infrastructure of Malatya had already been heavily damaged, which is why the recent moderate earthquake caused further harm and led to the injuries.