Daily Sunspots: April 2, 2025 (4/2/25) #PinoAstro

Solar observation of the sun today, Tuesday, April 2, 2025 (4/2/25, 02 APR 2025, 2025/04/02).

Original image courtesy of NASA's Solar Dynamics Observatory (SDO) HMI. Pino Astro image edit and video production.

Sunspot Clusters are also known as or called Active Regions.

Area of sunspots are measured in millionths of a solar hemisphere (MH).

For updates on today's Sun flares, visit:

Flare strength is rated on a scale that includes C-class, M-class, X-class and Proton-class flares.

What are Sunspots?- Sunspots arise from magnetic disturbances that change how the outer layers of the sun regionally mix, uncovering cooler spots that appear darker on the surface of the sun.

What's the point?- Sunspots and sunspot clusters are part of solar active regions (AR). We track active regions on the sun because they can cause solar flares and coronal mass ejections (CME). Particles ejected from CMEs can hit the Earth several hours later (as short as 15 hours and up to several days later) which cause aurora, and large solar storms can do damage to electronics, our electrical grid and satellites. Plus, sunspots look cool, and they are huge! Some can be several times the size of Earth.

Why should I care?- The Carrington Event was the most intense geomagnetic storm in recorded history, peaking on 1–2 September 1859 during solar cycle 10. It created strong auroral displays that were reported globally and caused sparking and even fires in telegraph stations. A geomagnetic storm of this magnitude occurring today has the potential to cause widespread electrical disruptions, blackouts, damage and impact human health due to extended cuts of the electrical power grid. A Carrington-class event today would result in between $0.6 and $2.6 trillion in damages to the U.S. alone.

Sun Observation- I try to post daily updates relatively early in the day so that others that have interest can see what's going on. I have heard from some other solar astronomers that they appreciate these short videos to see whether or not it's worth getting out their Hydrogen-alpha (H-alpha, Ha) solar telescopes, and it also gives them a preview of the sunspots and active regions.

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[PinoAstro]

147 sunspots today!

What are Sunspots?- Sunspots arise from magnetic disturbances that change how the outer layers of the sun regionally mix, uncovering cooler spots that appear darker on the surface of the sun.

What is a normal amount of sunspots? 200 sunspots are a crazy amount! When least active, there are whole years without a single sunspot! The sun goes through 11-year cycles of activity. The peak of that activity was likely in August 2024, but we are currently still in a very active period.

What is the highest number of sunspots recorded on the sun?
The highest number of sunspots recorded on the sun during this solar cycle (25) was 382 on August 10, 2024. The second most was 337, the day before, on August 9, 2024. Other historical highs were 285, observed in March 1958 and 244, recorded in July 2001.

What's the point?- Sunspots and sunspot clusters are part of solar active regions (AR). We track active regions on the sun because they can cause solar flares and coronal mass ejections (CME). Particles ejected from CMEs can hit the Earth several hours later (as soon as 15h and up to several days later) and cause aurora, and large solar storms can do damage to electronics, our electrical grid and satellites. Plus, sunspots look cool, and they are huge! Some can be several times the size of Earth.

[demonc]

It's only fair! Show us what will take us out.