Observatory · today
The Earth, right now
The Sun with this month’s spots, the Earth at today’s place on its orbit, the Moon at its real phase. Each theme below opens its series, with their sources and limits.
Sunspots
60
Kp index
2.3
Moon lit
92 %
Temperature anomaly
1.38 °C
Atmospheric CO₂
426.1 ppm
Meeus (1998) · Published literature; cited
SILSO monthly mean total sunspot number V2.0 · CC BY-NC 4.0 · 10/23/26
NOAA SWPC estimated planetary K index (3-hourly) · U.S. Government work, public domain · 10/23/26
Earth and Moon positions computed for this instant (Meeus); sizes and distances not to scale.
6.72 10⁶ km²
2026-10-17
Sea Ice Index v4, Northern Hemisphere daily extent (NSIDC) · NSIDC data, free with citation (Fetterer et al., 2017, updated daily) · 10/23/26
0.159 ms
2025-05-05
IERS EOP 20 C04 daily Earth orientation since 1962 · IERS data, free use with citation (Bizouard et al., 2019) · 10/23/26
115
2026
USGS ComCat earthquakes M ≥ 4.5 (FDSN event service) · U.S. Government work, public domain; cite USGS ANSS ComCat · 10/23/26
Each theme presents series measured or modeled by reference institutions (NOAA, USGS, NASA, SILSO, GFZ…), imported unchanged, with their unit, uncertainty, licence and retrieval date. Correspondences between phenomena are tested statistically and presented with their limits.
Sun
Image gallery, sunspots, cycles, flares, irradiance.
- Sun gallery
- Sunspots 3 series
- Solar cycles 5 series
- Solar flares 3 series
- Coronal mass ejections 4 series
- Total solar irradiance 1 series
Space weather
Live, aurora, geomagnetic storms, solar wind.
- Space weather now 9 series
- Aurora 1 series
- Geomagnetic storms 4 series
- Solar wind 3 series
Earthquakes and volcanoes
Seismic catalogues, eruptions, stratospheric aerosols.
- Earthquakes 3 series
- Volcanoes 2 series
- Stratospheric aerosols 3 series
Ocean and climate
El Niño, oscillations, currents, temperature, sea level, CO₂, sea ice.
- El Niño / La Niña 4 series
- Climate oscillations 4 series
- Gulf Stream and AMOC 1 series
- Global temperature 2 series
- Ocean heat content 4 series
- Sea level 4 series
- Atmospheric CO₂ 2 series
- Sea ice 2 series
- Tropical cyclones 14 series
Moon, tides and rotation
Lunar phases and distance, eclipses, tide gauges, length of day.
- Moon phases and distance
- Eclipses
- Tides 1 series
- Earth rotation 6 series
Magnetic poles
Modeled dip poles since 8000 BCE, surface field, the last reversal.
Correspondences
Cross-analyses between phenomena, with their significance and references.
- Volcanoes and temperature
- El Niño and length of day
- Sun and geomagnetic storms
- Tides and earthquakes
- Sun and earthquakes
- Geomagnetic jerks and length of day
- X flares and geomagnetic storms
- The 27-day recurrence
- El Niño and global temperature
- El Niño and the CO₂ growth rate
- El Niño and sea level
- Geomagnetic storms and earthquakes
- Halo CMEs and geomagnetic storms
- El Niño and Atlantic hurricanes
- Atlantic oscillation and hurricanes
- Sun and hurricanes
What this platform does, and does not do
It redraws published data without altering them: values are the providers’ own, aggregations (monthly or yearly means) are explicit, and every number links to its source. It produces no new scientific result and makes no forecast. The “Correspondences” pages test hypotheses from the literature with standard methods and keep reminding that correlation is not causation.
SOURCES OF THIS PAGE
- Meeus (1998)
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Meeus, J. (1998). Astronomical Algorithms, 2nd ed. Willmann-Bell.
Licence : Published literature; cited - SILSO monthly mean total sunspot number V2.0
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SILSO World Data Center. The International Sunspot Number, V2.0. Royal Observatory of Belgium, Brussels.
· source page ↗
Licence : CC BY-NC 4.0 · retrieved on Oct 23, 2026 · SHA-256 4749cc16c68e… - NOAA SWPC estimated planetary K index (3-hourly)
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NOAA SWPC, Planetary K-index (estimated, 3-hourly, from a network of ground magnetometers).
· source page ↗
Licence : U.S. Government work, public domain · retrieved on Oct 23, 2026 · SHA-256 9f4c8da19cb9… - Oceanic Niño Index (NOAA CPC)
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NOAA CPC, Oceanic Niño Index (ONI): 3-month running mean of ERSSTv5 SST anomalies in the Niño 3.4 region, centred 30-year base periods updated every 5 years.
· source page ↗
Licence : U.S. Government work, public domain · retrieved on Oct 23, 2026 · SHA-256 5d6fa3a2f857… - Sea Ice Index v4, Northern Hemisphere daily extent (NSIDC)
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Fetterer, F., Knowles, K., Meier, W. N., Savoie, M., & Windnagel, A. K. (2017, updated daily). Sea Ice Index, Version 4 (G02135), Northern Hemisphere daily extent. NSIDC.
· doi:10.7265/N5K072F8 · source page ↗
Licence : NSIDC data, free with citation (Fetterer et al., 2017, updated daily) · retrieved on Oct 23, 2026 · SHA-256 d36fc1791ba9… - IERS EOP 20 C04 daily Earth orientation since 1962
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IERS Earth Orientation Centre, EOP 20 C04 (IAU2000A) combined series, 1962–; Bizouard, C., et al. (2019), J. Geod. 93, 621–633.
· doi:10.1007/s00190-018-1186-3 · source page ↗
Licence : IERS data, free use with citation (Bizouard et al., 2019) · retrieved on Oct 23, 2026 · SHA-256 395e94687b8a… - USGS ComCat earthquakes M ≥ 4.5 (FDSN event service)
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U.S. Geological Survey, Earthquake Hazards Program (2017). Advanced National Seismic System (ANSS) Comprehensive Catalog of Earthquake Events and Products. Accessed through the FDSN event web service.
· doi:10.5066/F7MS3QZH · source page ↗
Licence : U.S. Government work, public domain; cite USGS ANSS ComCat · retrieved on Oct 23, 2026 · SHA-256 c1e3c08c2c8f…