Earthquakes
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Seismograph

4 killed in Guatemala earthquakes (UPDATE)

This handout picture released by the Bomberos Voluntarios de Guatemala shows volunteer
© AFPThis handout picture released by the Bomberos Voluntarios de Guatemala shows volunteer firefighters working to recover the bodies of two people who died after their vehicle was buried in rocks and soil during a landslide as a result of earthquakes in Santa Maria de Jesus, Guatemala, on July 8, 2025.
Two people were killed when their vehicle was buried under a landslide after a series of earthquakes shook much of the Central American country on Tuesday, Guatemalan authorities said.

The swarm of tremors up to 5.6 magnitude rattled the country on Tuesday afternoon, centered near the towns of Amatitlan and Alotenango southwest of the capital, seismological services reported.

"Unfortunately, human fatalities are confirmed" due to a landslide after rocks and earth buried a vehicle on a highway, said Andres Erazo, a spokesman for disaster coordination agency Conred.


Comment: Update July 10

AP reports:
Authorities on Wednesday confirmed a fourth death in Guatemala a day after dozens of earthquakes shook the country, leaving crumbled walls and roads blocked by landslides.

More than 150 earthquakes and aftershocks with magnitudes ranging from 3.0 to 5.7 have been reported since Tuesday afternoon.

President Bernardo Arévalo said on social media that the body of a woman who had been buried by debris south of Guatemala's capital had been recovered along with the body of her dog. He expressed his condolences to the victims' families, and was visiting a town near the epicenter.

Volunteer firefighters confirmed Wednesday that a 13-year-old boy's body had been recovered in the Sacatepequez department.

The other two victims were men killed by falling rocks while traveling in a truck on a road in the department of Escuintla, firefighters said.



Seismograph

6.3 magnitude earthquake strikes off New Zealand

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A 6.3 magnitude earthquake on Monday hit 208 kilometers (nearly 129 miles) off Riverton, New Zealand, at 1253GMT, the United States Geological Survey (USGS) said.

The epicenter, with a depth of 10.0 km, was initially found to be at 47.22 degrees south latitude and 165.60 degrees east longitude.

Australia's Bureau of Meteorology has calculated the quake at 6.5 magnitude, saying that there appears to be no risk of tsunami.

No casualties or damage to property have been reported so far.

Anadolu Ajansı

Bizarro Earth

Myanmar earthquake defies typical seismic patterns says study

Earthquake
© Image by Andrey VP/Shutterstock
Researchers at University of Tsukuba analyzed the source process of a significant earthquake that occurred in Myanmar in March 2025 using a novel approach, the potency density tensor inversion method. Unlike conventional methods, this approach does not assume the rupture propagation direction or fault geometry, allowing for a more flexible and accurate analysis. The results revealed an exceptionally complex source process characterized by asymmetric and rapid rupture growth that repeatedly propagated along the fault in both the north and south directions.

Tsukuba, Japan — On March 28, 2025, a major earthquake with a moment magnitude (Mw) of 7.7 struck Mandalay, central Myanmar (referred to as the 2025 Myanmar earthquake). This event caused severe shaking and substantial damage in Myanmar and neighboring countries. Aftershock distribution extended southward from the epicenter, indicating predominant southward rupture propagation. In such cases, a Doppler-like directivity effect usually results in sharp, high-amplitude pulse waveforms recorded in the rupture propagation direction (south of the epicenter in this instance). However, seismic observations showed large amplitudes and sharp pulses at stations north of the epicenter, while stations to the south recorded smaller amplitudes and prolonged, multi-peaked waveforms. This anomalous pattern suggests that the Myanmar earthquake exhibited an unconventional rupture behavior.

To investigate this, researchers applied the potency density tensor inversion method to flexibly analyze the seismic waveform data without predefining the rupture direction or fault geometry. The analysis revealed that the source process consisted of multiple rupture episodes with complex characteristics. Notably, asymmetric ruptures propagated in both north and south directions, while each episode generally extended southward from the hypocenter. In particular, during the initial rupture episode, the rupture propagated southward before reversing direction and propagating northward in a boomerang-like manner at a shear velocity exceeding the S-wave velocity, indicating supershear rupture.

Seismograph

Shallow 6.6 earthquake in the South Atlantic Ocean

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A very strong magnitude 6.6 earthquake occurred in the South Atlantic Ocean 298 km (185 mi) from Antarctica on Sat, Jun 28, 2025 at 08:32 GMT.

The depth of the quake could not be determined, but is assumed to be shallow.

The quake was not felt (or at least not reported so).

Earthquake details

Date & time Jun 28, 2025 08:32:21 UTC
Local time at epicenter Saturday, Jun 28, 2025, at 08:32 am (Universal Time GMT +0)
Status confirmed (manually revised)
Magnitude 6.6
Depth 10 km
Primary data source USGS (United States Geological Survey)

Seismograph

6.1-magnitude quake hits off southern Philippines

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A magnitude-6.1 earthquake struck deep off the coast of the southern Philippines on Saturday, the United States Geological Survey said.

There were no immediate reports of casualties or damage from the quake, which the USGS reported occurred at a depth of 101 kilometers (63 miles) about 70 kilometers from the nearest areas of Davao Occidental province.

"The shake was not that strong, but the tables and computers here at the office shook for (about five seconds)," Marlawin Fuentes, a provincial rescuer from the tiny island of Sarangani, told AFP.

No tsunami alert was triggered.

Quakes are a near-daily occurrence in the Philippines, which is situated on the Pacific "Ring of Fire," an arc of intense seismic activity that stretches from Japan through Southeast Asia and across the Pacific basin.

Most are too weak to be felt by humans, but strong and destructive ones come at random with no technology available to predict when and where they might strike.

AFP

Seismograph

Shallow 6.2-magnitude quake hits southern Mid-Atlantic Ridge: USGS

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An earthquake with a magnitude of 6.2 jolted southern Mid-Atlantic Ridge at 22:16:15 GMT yesterday, the U.S. Geological Survey (USGS) said today.

The epicenter, with a depth of 10.0 km, was initially determined to be at 35.56 degrees south latitude and 17.12 degrees west longitude.

UNI

Seismograph

Shallow 6.2 magnitude earthquake strikes off the Philippines, no Tsunami warning issued

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A powerful earthquake measuring 6.2 on the Richter scale struck the Philippines on Tuesday morning, June 24, though no tsunami warnings have been issued so far.

According to the National Centre for Seismology, the quake hit at 7:28 AM local time, east of the Philippine islands, at a shallow depth of 10 kilometers below the surface.

The Philippine Institute of Volcanology and Seismology (Phivolcs) reported a slightly higher magnitude of 6.4 but confirmed that no tsunami alert had been triggered.

The Philippines, located on the Pacific "Ring of Fire," frequently experiences seismic activity. The last major earthquake to hit the country was in July 2022, a magnitude 7 tremor that caused landslides, ground fissures, and widespread damage in the northern Abra region. That quake resulted in 11 deaths and injured over 600 people, according to AFP.

Authorities are monitoring the situation, and no immediate reports of significant damage or casualties have emerged from Tuesday's quake.

Seismograph

Shallow 6.1-magnitude quake hits 88 km ESE of Nemuro, Japan -- USGS

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An earthquake with a magnitude of 6.1 jolted 88 km ESE of Nemuro, Japan at 21:23 GMT on Saturday, the U.S. Geological Survey said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 42.90 degrees north latitude and 146.50 degrees east longitude.

Xinhua

Seismograph

Powerful 5.2 magnitude earthquake strikes near Iran's Semnan city

iran earthquake north
© Mapbox/Republic WorldA 5.2 nagnitude earthquake has struck near Iran's Semnan city June 20, 2025
A powerful earthquake struck near Iran's Semnan, sending tremors through the region. According to reports from the GFZ, a magnitude 5.2 earthquake occurred around 35 km southwest of Semnan at 5.49 local time. The earthquake's depth was recorded at 10 km, indicating a relatively shallow tremor that could possibly cause major damage.

As news of the earthquake spreads, concerns are growing about the potential impact on the region. Semnan, a city in northeastern Iran, is known for its rich history and cultural importance. The earthquake's epicentre, located near the city, raises concerns about damage to historical sites and infrastructure. While details about injuries or damage are still emerging, the region's vulnerability to seismic activity heightens the stakes.

Comment: Aaand the speculation is on that the quake was actually Iran testing a nuke. May voices of reason prevail






Earthquake

Tectonic plates can spread subduction like a contagion — jumping from one oceanic plate to another

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© Universal History Archive/Getty ImagesThe Andes Mountains formed from the convergence of the Nazca plate and the South American plate. Aracar, seen in a satellite image from Feb. 20, 2000, is one of many volcanoes in the Andes range.
Subduction zones, where one tectonic plate dives underneath another, drive the world's most devastating earthquakes and tsunamis. How do these danger zones come to be? A study in Geology presents evidence that subduction can spread like a contagion, jumping from one oceanic plate to another — a hypothesis previously difficult to prove.

This result "is not just speculation," says University of Lisbon geologist João Duarte, who was not involved in the research. "This study builds an argument based on the geological record."

Because subduction drags crust deep into the earth, its beginnings are hard to examine. The new study provides a rare ancient example of potential subduction "infection." Its authors say they've discovered evidence that neighboring collisions triggered East Asia's "Ring of Fire," a colossal subduction system currently fueling earthquakes and volcanoes from Alaska to the southern Indian Ocean.