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Partial solar eclipse on August 11

Photo of partial solar eclipse on October 23, 2014, via Mikael Linder

The new moon supermoon on August 11, 2018, ushers in partial solar eclipse in the daytime, and dark nights for this weekend’s Perseid meteor shower. The northern Arctic areas, which are drenched in daylight at this time of year, are in a good position to watch the solar eclipse but not the Perseids.

This partial eclipse occurs in the daylight hours on August 11 in the Arctic, far-northeastern Canada, Greenland, Iceland, Scandinavia, and much of Asia (north and east). The worldwide map and animation below show where the eclipse is taking place. On a worldwide scale, the partial eclipse lasts about 3.5 hours, starting at sunrise in northeastern North America and ending at sunset along the Asian Pacific Coast. If you’re in a position to witness this eclipse, be sure to use proper eye protection.

View larger. Worldwide map of the 2018 August 11 partial solar eclipse via .

Everyplace within the moving gray circle sees various stages of a partial solar eclipse.

We give the local times of the eclipse for several localities below. If your locality is not listed, the local eclipse times for hundreds of cities are available at EclipseWise or TimeandDate.

2018 August 11 partial solar eclipse

Alert, Nunavut, Canada
Eclipse begins: 4:24 a.m. local time
Maximum eclipse: 5:12 a.m. local time
Eclipse ends: 6:00 a.m. Local time
Eclipse obscuration: 48.2% of the solar disk

Helsinki, Finland
Eclipse begins: 11:51 a.m. local time
Maximum eclipse: 12:18 p.m. local time
Eclipse ends: 12:45 p.m. Local time
Eclipse obscuration: 2.7% of the solar disk

Beijing, China
Eclipse begins: 6:13 p.m. local time
Maximum eclipse: 6:51 p.m. local time
Eclipse ends: 7:14 p.m. Local time
Eclipse obscuration: 23.0% of the solar disk

Sources: EclipseWise and TimeandDate.

Click at any chosen spot on this cool interactive Google eclipse map for eclipse times. However, you must convert Universal Time to local time. Here’s how.

Three eclipses in one lunar month

The partial solar eclipse on August 11, 2018, presents the third of three eclipses in one lunar month – the period of time between successive new moons (approximately 29.5 days):

Partial solar eclipse: July 13, 2018
Total lunar eclipse: July 27, 2018
Partial solar eclipse: August 11, 2018

A solar eclipse, when it happens, always occurs within one fortnight (approximately two weeks) of a lunar eclipse. During an eclipse season, which recurs several days shy of six calendar months, there are generally two eclipses in the framework of one lunar month. However, given certain circumstances, it’s possible for one lunar month to showcase three eclipses – either two solar and one lunar, or one lunar and two solar.

If the full moon aligns especially closely with the central part of the Earth’s dark shadow, as it did on July 27, 2018, the result is an especially long-lasting total lunar eclipse. In this scenario, the total solar eclipse is flanked one fortnight before and after by a partial solar eclipse.

It’s no accident that one of these partial solar eclipses (July 13, 2018) happens in the southern part of the globe, whereas the other (August 11, 2018) reigns in the northern regions. That’s always the case whenever there’s a central total lunar eclipse, such as the one on July 27, 2018.

The last time a total lunar eclipse and two partial solar eclipses happened in one lunar month was in 2011 and the next time will be 2029:

Partial solar eclipse: June 1, 2011
Total lunar eclipse: June 15, 2011
Partial solar eclipse: July 1, 2011

Partial solar eclipse: June 12, 2029
Total lunar eclipse: June 26, 2029
Partial solar eclipse: July 11, 2029

The total lunar eclipse on July 27, 2018, followed the partial solar eclipse on July 13, 2018, and preceded the partial lunar eclipse of August 11, 2018. But that’s not all. The smallest full moon of the year on July 27, 2018, came one fortnight after the new moon supermoon of July 13, 2018, and before the new moon supermoon on August 11, 2018.

If you live in the northern regions of the globe, you just might see the supermoon partial eclipse of the sun on August 11, 2018.

Bruce McClure

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