Magnetic storms in Anchorage
Magnetic storms in Anchorage, Alaska today. Current Kp index, 3-day forecast for Anchorage, local time, geomagnetic latitude and aurora visibility chance.
Data as of 11 Jun, 23:00 (America/Anchorage).
Weather in Anchorage
Weather data: Open-Meteo (CC BY).
Health and geomagnetic storms
A small library on how geomagnetic activity is associated with blood pressure, migraine, sleep, the cardiovascular system, anxiety and general wellbeing. Backed by peer-reviewed research, free of medical advice.
Medication and geomagnetic storms
Whether to adjust antihypertensives and other drug doses on storm days, and what cardiologists and neurologists recommend.
HealthSleep and geomagnetic storms
Why sleep quality drops during storm days, how geomagnetic activity relates to melatonin and sleep architecture.
HealthOlder adults and geomagnetic storms
Why seniors are more sensitive to Kp, how to support older relatives, and which risks to keep in mind.
Health
Local context
Sensitivity · Anchorage
High sensitivity (sub-auroral zone)
Kp is a planetary index — the same globally. Local impact depends on geomagnetic latitude: the higher it is, the more noticeable the storm.
14-day calendar with Kp, moon and cloud factors
Seven quick questions and personal tips
Geomagnetic context for Anchorage
Magnetic storm in Anchorage: 3-day Kp chart
Aurora forecast in Anchorage
| Date | Max Kp | Moon | Clouds | Score | Outlook |
|---|---|---|---|---|---|
| Thu, Jun 11 | — | 19% | 36% | — | Kp forecast is not yet available for this date. |
| Fri, Jun 12 | 4.7 | 12% | 28% | 44 | Possible if you are away from city lights. |
| Sat, Jun 13 | 5.7 | 6% | 77% | 20 | Possible if you are away from city lights. |
| Sun, Jun 14 | 4.7 | 2% | 96% | 3 | Auroras are very unlikely tonight. |
| Mon, Jun 15 | 2.0 | 0% | 72% | 7 | Low chance, only the strongest auroras will show. |
| Tue, Jun 16 | 3.0* | 1% | 56% | 28 | Possible if you are away from city lights. |
| Wed, Jun 17 | 3.0* | 3% | 66% | 22 | Possible if you are away from city lights. |
| Thu, Jun 18 | 3.0* | 8% | 49% | 32 | Possible if you are away from city lights. |
| Fri, Jun 19 | 3.0* | 15% | 33% | 40 | Possible if you are away from city lights. |
| Sat, Jun 20 | 3.0* | 23% | 19% | 46 | Worth checking the sky, good chance to see something. |
| Sun, Jun 21 | 3.0* | 33% | 28% | 38 | Possible if you are away from city lights. |
| Mon, Jun 22 | 3.0* | 43% | 96% | 2 | Auroras are very unlikely tonight. |
| Tue, Jun 23 | 3.0* | 54% | 82% | 8 | Low chance, only the strongest auroras will show. |
| Wed, Jun 24 | 3.0* | 64% | 26% | 31 | Possible if you are away from city lights. |
| Thu, Jun 25 | 3.0* | 74% | — | 27 | Possible if you are away from city lights. |
- Thu, Jun 11no dataMax Kp: —Moon: 19%Clouds: 36%Kp forecast is not yet available for this date.
- Fri, Jun 1244Max Kp: 4.7Moon: 12%Clouds: 28%Possible if you are away from city lights.
- Sat, Jun 1320Max Kp: 5.7Moon: 6%Clouds: 77%Possible if you are away from city lights.
- Sun, Jun 143Max Kp: 4.7Moon: 2%Clouds: 96%Auroras are very unlikely tonight.
- Mon, Jun 157Max Kp: 2.0Moon: 0%Clouds: 72%Low chance, only the strongest auroras will show.
- Tue, Jun 1628Max Kp: 3.0*Moon: 1%Clouds: 56%Possible if you are away from city lights.
- Wed, Jun 1722Max Kp: 3.0*Moon: 3%Clouds: 66%Possible if you are away from city lights.
- Thu, Jun 1832Max Kp: 3.0*Moon: 8%Clouds: 49%Possible if you are away from city lights.
- Fri, Jun 1940Max Kp: 3.0*Moon: 15%Clouds: 33%Possible if you are away from city lights.
- Sat, Jun 2046Max Kp: 3.0*Moon: 23%Clouds: 19%Worth checking the sky, good chance to see something.
- Sun, Jun 2138Max Kp: 3.0*Moon: 33%Clouds: 28%Possible if you are away from city lights.
- Mon, Jun 222Max Kp: 3.0*Moon: 43%Clouds: 96%Auroras are very unlikely tonight.
- Tue, Jun 238Max Kp: 3.0*Moon: 54%Clouds: 82%Low chance, only the strongest auroras will show.
- Wed, Jun 2431Max Kp: 3.0*Moon: 64%Clouds: 26%Possible if you are away from city lights.
- Thu, Jun 2527Max Kp: 3.0*Moon: 74%Clouds: —Possible if you are away from city lights.
* Days marked with an asterisk do not have a direct NOAA forecast yet. If we have observations from 27 days ago, we use Bartels recurrence (the Sun rotates roughly every 27 days, so active regions often return with the same period). When no history is available, we substitute a baseline value typical for the current solar cycle 25 peak (Kp 3.0). Accuracy is lower than the direct three-day forecast.
How the score works
The composite score combines three signals: how strong the storm needs to be at your geomagnetic latitude, how bright the moon will be (a full moon hides faint auroras), and how cloudy the sky will be that night. A score of 70 or higher is excellent, 45 to 70 is good, below 20 means you probably will not see anything.
Magnetic storms in Anchorage over the last 30 days
Geomagnetic storms of class G1 and above recorded over the past month. Times are shown in the city's local timezone (AKDT).
In Anchorage (geomagnetic latitude 61.9°), auroras are possible from Kp ≥ 3.
| Date | Peak | Max Kp | Level | Duration | Aurora visible |
|---|---|---|---|---|---|
| 10:00 | 5.0 | G1 | 3 h | Yes | |
| 07:00 | 6.3 | G2 | 12 h | Yes |
About magnetic storms in Anchorage
Magnetic storm in Anchorage today: planetary Kp = 3.0 (quiet). Over the last 7 days the maximum Kp above Anchorage reached 6.3 (G2); storm days (G1+) this week: 2.
Anchorage sits at geomagnetic latitude 61.9°. The nearest magnetic observatory continuously recording the field is Magadan (Stekolnyi), 3128 km away. Population 289,600.
Anchorage lies in the sub-auroral zone (61.9°), where storms are felt several times per year. At G3 and stronger, weather-sensitive residents may experience blood-pressure changes, headaches and sleep issues; pensioners and people with hypertension should watch the forecast. During a storm, drink more water, avoid alcohol and strong coffee, and reduce intense physical exertion.
Technical consequences for Anchorage (sub-auroral zone, 61.9°) appear from G4 upward: GPS and HF radio may degrade, precise positioning can drift, and northern power grids in the region carry a measurable GIC risk during the strongest events. Drivers on long routes should track the forecast for the next 24 to 72 hours. Source: NOAA Space Weather Prediction Center, updated every 10 minutes.
Over Anchorage during the last 24 hours. Kp reached a maximum of 5.0 around 10:00 local time and dipped to 2.3. The planetary trend over the past 6 hours is falling — the magnetosphere near Anchorage is in the recovery phase. So far this month the planet has logged 2 days with a G1 or stronger geomagnetic storm.
Aurora visibility threshold for Anchorage. At a geomagnetic latitude of 61.9°, the minimum Kp giving a realistic chance of visible auroras above Anchorage is about Kp ≥ 3. The current equatorial Dst index is 0 nT — the magnetosphere is in a quiet phase. Dst complements Kp by showing how long and how deep a storm's main phase has been — useful context when checking whether auroras are likely tonight.
Weather and atmospheric pressure in Anchorage right now. Temperature +14.5°C, atmospheric pressure 764.4 mm Hg (1019.1 hPa), cloud cover 5%, humidity 57%, wind 9.6 km/h. During G1+ geomagnetic storms, swings in atmospheric pressure tend to amplify symptoms for weather-sensitive people: those with hypertension often notice blood-pressure spikes, and readings below 1000 hPa combined with Kp ≥ 5 frequently bring headaches and fatigue. That is why the Anchorage page shows both indicators side by side. Weather data from Open-Meteo (CC BY).
Aurora viewing window for Anchorage tonight. Sunset is at 12:36 local time, sunrise tomorrow at 17:22. Moon phase — waning crescent with 10% disk illumination. Clear sky and low moonlight make the window favorable — with enough Kp, the aurora may be visible even from within city limits..