Tag

Earthquakes

All articles tagged with #earthquakes

science12 days ago•5 min saved

Tidal Resonance Explains How Sun and Moon Trigger Slow Earthquakes

New research published in JGR Solid Earth proposes that gravitational tides from the Sun and Moon trigger slow earthquakes through a resonance mechanism. Although tidal stresses are minimal, comparable to a gentle hand press, they can nudge unstable fault lines into slipping. The study suggests that when tidal perturbation periods match a fault's natural response timescale, the resulting resonance amplifies slip, potentially leading to both slow and fast seismic events. This framework helps explain observed tremors in regions like southwest Japan and Cascadia, which often peak at 12- or 24-hour intervals. While the model focuses on single fault patches, it offers a method to reverse-engineer fault properties from seismic data, aiding in the assessment of megathrust earthquake risks.

via ScienceAlert|

#earthquakes #geophysics #jgr-solid-earth

news13 days ago•1 min saved

Back-to-back tremors rattle California coast amid rising seismic activity

Two earthquakes struck California on Sunday morning, with a 3.5-magnitude quake hitting near El Segundo and Hermosa Beach, followed by a smaller tremor. Shaking was felt across the South Bay and parts of the Bay Area, though no injuries or damage were reported. The events occur amid a recent uptick in seismic activity across the state.

via New York Post|

#california #earthquakes #news

science17 days ago•94 min saved

Italy's Earthquakes Linked to Crust 'Unzipping' Rather Than Plate Collision

New research indicates that seismic activity in Italy's Apennine Mountains is primarily driven by the peeling away of the lower crust into the mantle, a process known as delamination, rather than traditional plate subduction. This 'unzipping' mechanism explains the region's complex mix of compression and extension, with implications for understanding similar tectonic transitions elsewhere.

via Live Science|

#delamination #earthquakes #geology

science23 days ago•210 min saved

Lingering quakes hint at long-term crustal memory at NK’s Punggye-ri site

A Science study analyzing data from 2008–2025 finds a sustained rise in seismic activity around North Korea’s Punggye-ri nuclear test site, intensifying after the 2017 detonation. Most quakes are small (magnitude 2–3) and shallow, suggesting preexisting intraplate faults near Mount Mantap were reactivated and that the final test may have triggered long-lasting crustal instability. The finding could complicate long-term monitoring of underground tests, and while no new tests are confirmed, data limitations mean the true rate of seismicity could be higher.

via CNN|

#earthquakes #north-korea #nuclear-testing

science23 days ago•11 min saved

Seismic Aftermath: NK's 2017 Nuclear Tests Triggered Years of Earthquakes

Scientists analyzing 2008–2025 seismic data found 1,399 small earthquakes linked to North Korea’s Punggye-ri underground tests (2006–2017), with activity increasing for years after the final blast as repeated detonations altered crustal stresses and triggered faults beneath Mount Mantap. They mapped two fault-like structures, suggesting the mountain’s geology created a long-lived framework for slip; a hypothetical single rupture could reach magnitude ~6.4, but causality isn’t proven and monitoring may need to extend far beyond the test period.

via ScienceAlert|

#earthquakes #mount-mantap #north-korea

entertainment29 days ago•5 min saved

Pierce Brosnan Eyes Malibu Exit Over Wildfire Fears and Costs

Pierce Brosnan and wife Keely Shaye Smith are preparing to leave their $100 million Malibu oceanfront compound after more than two decades, citing wildfire risk, earthquakes along a fault line, and the high costs of maintaining the estate; after a 2015 garage fire and Malibu’s wildfire catastrophes in 2025, the couple split their time with Kauai and hint at a permanent move to Hawaii.

via New York Post|

#earthquakes #entertainment #malibu

science1 month ago•52 min saved

Scientists pinpoint likely locations of major earthquakes, not the exact moment

UC Riverside researchers used GPS data and an algorithm to identify locked, stress-building portions of major faults (asperities) to indicate where the next large earthquake is likely to rupture. In tests, the model highlighted the Kamchatka subduction zone before the 2025 quake, suggesting potential for long-term hazard mapping, though it cannot predict timing or tsunami size; the team plans to apply the method to other subduction zones for improved preparedness.

via Yahoo|

#asperities #earthquakes #gps

science1 month ago•56 min saved

California scientists map likely megaquake hotspots — timing remains uncertain

UC Riverside researchers have developed a GPS-based, fault-stress modeling method to identify fault segments most likely to produce major earthquakes, especially along subduction zones. While the approach cannot predict when an earthquake will occur or its size, it can pinpoint high‑risk areas to improve long‑term preparedness and guide California fault studies (e.g., Hayward) using measurements of accumulated strain and related algorithms, with real-world references like the Kamchatka 2025 quake illustrating how stress hotspots relate to rupture zones.

via Yahoo|

#california #earthquakes #geophysics

science1 month ago•25 min saved

Fault-stress mapping pins down likely megaquake zones, not exact events

California researchers have developed a GPS-based method to identify locations along major fault lines most prone to producing giant earthquakes. By measuring accumulated strain in subduction zones with an algorithm, the approach can pinpoint hotspot areas where large quakes are more likely, though it cannot predict when or how severe they’ll be. The method offered insights from a Kamchatka quake in 2025 and is being applied to California faults like the Hayward Fault to improve long-term preparedness.

via New York Post|

#california #earthquakes #fault-lines

us-news1 month ago•23 min saved

Small LA quake near Compton sparks big fault-line fears

An overnight 3.2-magnitude earthquake struck near Compton in Los Angeles' South Bay, with a depth of about 8 miles; there were no injuries or damage reported, though residents felt the tremor. Scientists warn Southern California sits atop major fault systems (San Andreas and San Jacinto) and that a larger quake could occur in the future, potentially near magnitude 7.5, especially around Cajon Pass where faults intersect. The region's seismic history includes deadly quakes such as Northridge (1994) and San Fernando (1971).

via New York Post|

#california #compton #earthquakes

science1 month ago•6 min saved

Shallower Cascadia Fault Could Intensify Oregon Quake Shaking

A new seismic analysis shows the Juan de Fuca slab beneath northern Oregon sits about 5 km closer to the surface than previously thought, potentially boosting peak ground shaking from a future Cascadia megathrust quake by roughly 9–17% along the coast, and a deep Tillamook sediment basin could further amplify motion by trapping seismic waves.

via Science Daily|

#cascadia #earthquakes #ground-shaking

science1 month ago•2 min saved

Hidden Mountainville Fault Traced as Source of 2024 East Coast Quake

A magnitude-4.8 earthquake that surprised millions along the U.S. East Coast was traced to a previously unmapped fault in the New Jersey Highlands, now named the Mountainville Fault. The finding shows that hidden, immature faults can generate significant quakes away from major surface fault systems, underscoring the need to reassess regional seismic hazard near densely populated areas like New York City.

via Gizmodo|

#earthquakes #east-coast-quake #mountainville-fault

local-news1 month ago•1 min saved

Northern San Andreas Fault Slips Faster, Hinting at More Frequent Quakes

A new geologist's study indicates the northern San Andreas Fault is slipping faster than previously thought, suggesting earthquakes may occur more frequently in the Bay Area; the digest also notes a Fairfield disappearance and various regional and national news items.

via SFist|

#bay-area #earthquakes #geology

science1 month ago•5 min saved

San Andreas Slip Shows Steady Pace Over 10,000 Years, Study Suggests

San Jose State University researchers studying Sanborn County Park conclude the San Andreas Fault’s slip rate may have remained constant for about 10,000 years, similar to northern segments. If confirmed, this steady pace could imply a higher frequency of earthquakes, but the findings are not yet peer-reviewed, and Californians are advised to stay prepared for potential seismic activity.

via New York Post|

#california #earthquake-preparedness #earthquakes

science1 month ago•3 min saved

San Andreas slip rate higher than thought, Bay Area quakes may come more often

San Jose State University researchers say the San Andreas Fault is slipping faster than previously estimated over a 10,000-year window, with a rate similar to the northern coast segment; though not yet peer-reviewed, the finding suggests earthquakes on this fault could occur more frequently, reinforcing the need for Bay Area preparedness after a recent 3.9 magnitude quake on the Hayward Fault.

via ABC7 Bay Area|

#bay-area #earthquake-preparedness #earthquakes