Northern Lights in Portugal: Solar Storm Lights Up Skies
- A significant geomagnetic storm, reaching levels 4 to 5 on a scale of 1 to 5, began impacting Earth on Monday, January 15, 2024, and is expected to...
- A geomagnetic storm is a temporary disturbance of the EarthS magnetosphere caused by a solar wind shock.
- This current event is classified as a G4 (Severe) to G5 (Extreme) storm.According to SWPC's January 12, 2024, watch, the storm is a result of a series of...
Geomagnetic Storm Impacts Earth
Table of Contents
A significant geomagnetic storm, reaching levels 4 to 5 on a scale of 1 to 5, began impacting Earth on Monday, January 15, 2024, and is expected to continue, though weakening, on Tuesday, January 16, 2024. The event is being monitored by the U.S. space weather Prediction Center (SWPC), a division of the National Oceanic and Atmospheric Governance (NOAA).
What is a Geomagnetic Storm?
A geomagnetic storm is a temporary disturbance of the EarthS magnetosphere caused by a solar wind shock. These storms result from various solar phenomena, including coronal mass ejections (CMEs) and solar flares. The strength of a geomagnetic storm is categorized on a scale from G1 (Minor) to G5 (Extreme).
This current event is classified as a G4 (Severe) to G5 (Extreme) storm.According to SWPC’s January 12, 2024, watch, the storm is a result of a series of CMEs that left the Sun in early January.
Potential Impacts of the Storm
Geomagnetic storms can have several effects on Earth and its technological systems. These include disruptions to high-frequency (HF) radio communications, GPS inaccuracies, and power grid fluctuations. Strong storms can also cause stunning auroral displays visible at lower latitudes than usual.
The SWPC details potential impacts, noting that G4 storms can cause voltage control problems in power systems, while G5 storms can lead to widespread power outages and damage to satellites. On January 16,2024,Reuters reported that the storm caused radio blackouts and spectacular auroras were visible across the northern United States.
The Role of the U.S. Space Weather Prediction Center
The U.S. Space Weather Prediction Center (SWPC) is the official source of space weather alerts and warnings. it monitors the Sun and its activity, forecasts space weather events, and provides information to various stakeholders, including power grid operators, satellite operators, and airlines.
Meteorologist Shawn Dahl of the SWPC explained the current storm’s intensity in a video cited by Agence France-Presse (AFP) on January 16, 2024, emphasizing the potential for continued impacts throughout the day.
Past Context
Severe geomagnetic storms have occurred throughout history. The Carrington Event of 1859 remains the most intense geomagnetic storm on record. It caused widespread telegraph system failures and auroras visible around the world. A similar event today could have far more significant consequences due to our reliance on technology.
A more recent significant event was the October 1989 geomagnetic storm, which caused a nine-hour power outage in Quebec, Canada, affecting approximately six million people.