A groundbreaking study has uncovered a fascinating phenomenon related to the aurora-like display known as STEVE, often seen as a mysterious, glowing purple ribbon in the sky. Scientists have discovered that STEVE has a “secret twin” that appears only under very specific conditions, right before dawn.
STEVE (Strong Thermal Emission Velocity Enhancement) is a striking atmospheric phenomenon, first noticed by skywatchers and later confirmed by scientists. Unlike traditional auroras, which are typically green and caused by the interaction of solar wind with Earth’s magnetic field, STEVE appears as a rare, vibrant purple and white ribbon across the sky. Until recently, its origins were unclear, but recent research has provided new insights into its elusive nature.
In a recent study published in a prominent scientific journal, researchers explored the phenomenon in greater detail, revealing that STEVE’s twin is a counterpart that manifests at a different time of the day. While STEVE typically appears during the night, the ‘twin’ phenomenon is seen just before sunrise, making it even more difficult to observe. The twin displays a similar shape and color but tends to appear much more faint and in different areas of the sky.
Researchers believe the two phenomena share a similar origin: both are related to unusual interactions between charged particles from the solar wind and Earth’s magnetosphere. However, the timing and specific characteristics of the two events differ, offering new clues into the dynamic processes taking place high above our heads.
The study also involved data from satellites and ground-based observations, allowing scientists to identify the unique conditions required for both versions of STEVE to form. The discovery of the twin could provide critical information about the processes that lead to such rare auroral displays, which are much less understood compared to traditional auroras.
As this “secret twin” phenomenon becomes more known, it could open new avenues for both amateur skywatchers and scientists alike, eager to capture and understand these stunning and mysterious celestial events.