1336 5.8 Earthquake Cuba Area. EQ activity Northern California

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1336 5.8 Earthquake Cuba Area. EQ activity Northern California 

17 Mar 2026 A 5.8 earthquake occurred off the coast of Cuba, near the Caribbean plate boundary, with a 4.1 aftershock. This area has a history of larger earthquakes, including a 6.8 in 2024. Recent seismic activity in the region, including the Middle America Trench and the Cascadia subduction zone, could potentially impact the Caribbean plate. 

A coronal mass ejection (CME) is headed towards Earth, potentially causing aurora activity. While not a massive CME, it will elevate plasma density and could interact with a high-speed solar wind stream. There is a 25% chance of an M-flare, 80% chance of a C-flare, and a 5% chance of an X-flare, with the latter being unexpected.  

Key points

  • * Recent Earthquake Activity: A 5.8 magnitude earthquake occurred off the coast of Cuba, followed by a 4.1 aftershock. * Location and Depth: The earthquake struck 7 miles deep along the Caribbean plate boundary, away from major populated areas. * Historical Context: The Caribbean plate boundary has experienced significant earthquake activity in the past, with historical records documenting events larger than the recent 5.8 magnitude earthquake. * Cuba Earthquake Monitoring: Monitoring a 5.8 magnitude earthquake near Cuba and assessing potential aftershocks along the plate boundary. * Cascadia Subduction Zone Activity: A 4.3 magnitude earthquake in the Blanco fracture zone may impact the southern end of the Cascadia subduction zone, potentially increasing tremor counts. * Recent Earthquake Summary: Brief overview of recent earthquakes, including a 5.8 near Cuba, a 2.5 near Mineral, Washington, and several smaller earthquakes along the Cascadia subduction zone. * Seismic Activity in the US: Mentioned earthquakes along the Cascadia subduction zone, San Andreas fault, Nevada, Texas, and Oklahoma. * Seismic Activity in the Pacific: Noted activity in New Zealand, Indonesia, Japan, and Alaska. * Space Weather Update: Briefly mentioned an updated aurora forecast for the next 48 to 72 hours. * Eclipse Observation: The Earth is currently blocking the Sun’s view from the spacecraft. * CME Impact: A CME from an Mflare is heading towards Earth, potentially causing aurora activity. * G2 Storm Prediction: A G2 class storm is predicted for March 19th UTC, potentially leading to auroras. * Solar Activity Forecast: Low chance of significant solar flares, with Mflair at 25% and Cflare at 80%. Xflare increased to 5% despite limited intermixing and potential decay. * Tornado and Wind Activity: Two tornadoes reported in North Carolina, along with 325 wind damage reports and one hail report. * Severe Weather Outlook: Tonight, a slight severe weather risk remains in the Washington DC region, with a minor tornado threat and wind. No significant weather events are expected for Tuesday or Wednesday. * Upcoming Weather: Cold air mass behind the frontal boundary. No severe weather expected soon. * West Coast Forecast: Trough expected to bring snow, wet weather, and cooler temperatures by the end of March. * Recent Weather: Unseasonably hot weather in Northern California, with temperatures reaching the 80s and 90s.

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