Summer Solstice

The summer solstice will occur at 05:54HST today.

Sunset among the puʻu of Mauna Kea
Sunset light and fog in among the puʻu on the south flank of Mauna Kea

The Sun has reached the most northerly declination it will achieve this year. After today the Sun begins to move south in our skies.

Today will be the longest day of the year for those of us located in the northern hemisphere.

Today is considered the start of summer for most cultures in the northern hemisphere, or the start of winter for those in the southern hemisphere.

2019 Apsides and Seasons
Event Universal TimeHawaii Standard Time
Perihelion Jan 0305:20UTJan 0219:20HST
Spring Equinox Mar 2021:58UTMar 2011:58HST
Summer SolsticeJun 2115:54UTJun 2105:54HST
Aphelion Jul 0422:11UTJul 0412:11HST
Fall Equinox Sep 2307:50UTSep 2221:50HST
Winter SolsticeDec 2204:19UTDec 2118:19HST
Data from US Naval Observatory Data Services

Summer Solstice

Summer solstice occurs today at 18:24HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

This year many calendars will mark September 21st as the summer solstice, and so it is for much of the world. Here in Hawaiʻi the solstice actually occurs on the 20th when considering the time zone differences.

2017 Solstices and Equinoxes
  UT HST
Perihelion Jan 4 14:18UT Jan 4 04:18HST
Vernal Equinox Mar 20 10:29UT Mar 20 00:29HST
Summer Solstice Jun 21 04:24UT Jun 20 18:24HST
Apehelion Jul 3 20:11UT Jul 3 10:11HST
Autumnal Equinox Sep 22 20:02UT Sep 22 10:02HST
Winter Solstice Dec 21 16:28UT Dec 21 06:28HST
Source: USNO data Services

 

Summer Solstice

Summer solstice occurs today at 12:34HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

2016 Solstices and Equinoxes
  UT HST
Perihelion Jan 2 22:49UT Jan 2 12:49HST
Vernal Equinox Mar 20 04:30UT Mar 19 18:30HST
Summer Solstice Jun 20 22:34UT Jun 20 12:34HST
Apehelion Jul 4 16:24UT Jul 4 06:24HST
Autumnal Equinox Sep 22 14:21UT Sep 22 04:21HST
Winter Solstice Dec 21 10:44UT Dec 21 00:44HST
 
Source: USNO data Services

 

A Mid-Summer Snowfall atop Mauna Kea

A snowfall on the summit of Mauna Kea in mid-summer. A very pretty event, always nice to have some white atop the white mountain. It is even a better as a contrast to the very hot weather we have been having down below. Everyone has been commenting on the unusually warm weather, particularly Hilo residents who have suffered through record breaking warm days and near 100% humidity.

Midsummer snow atop Mauna Kea
A midsummer snowfall atop Mauna Kea on July 17th, 2015
The amazing, though somewhat predictable result of this midsummer snow is in the number of people who see this natural event through the window of their own biases. Interpreting the snow as a message or a means to further their adgenda…

I have been raised on Big Island all my life (which is a long time) and I have NEVER heard of it snowing in July, snow in May is the talk of the town, but in July? It is a miracle! Especially with the hot humid temperature breaking records, how did a trough get through? It must be a message from above and Poliahu’s blessings to our Mauna Protectors. Now all we need is the Kamakani to blow all of the existing telescopes away! EO – Anela2 comment on the West Hawaii Today website

I would point out to the comment author that I have photos in my archive of midsummer snows from almost all of the last eight summers. I can not remember a summer that has not featured snow atop the mountain, even if my photo collection is not complete. Snow can happen anytime of the year on the summit of Mauna Kea. Most summer snows are like this one, fairly minor and mostly melted away by the end of the day.

If the TMT goes up, I can be that this type of thing won’t happen anymore. That monstrosity will block the trough’s moving through the island as well as the winds. It will throw everything off. – Shalee Kekawa comment on the West Hawaii Today website

Either this is a good example of Poe’s Law, or the author really believes that, a truly sad state of science literacy. It gets worse…

Is anyone testing the snow for any chemicals sprayed from the sky? – Josephine Keliipio Facebook comment

An astute observer will note this same sort of occurrence whenever something unusual happens. A few volcanic eruptions hit the news within a few days and people are claiming it is a sign of imminent apocalypse. While anyone who pays attention to volcanoes is fully aware that 12-20 volcanoes are erupting at any given time on the planet, the event is nothing unusual. Earthquakes are good for the same phenomena.

This common misconception occurs when a person’s attention is attracted to something they do not normally pay any attention. Without any baseline data stemming from experience, everything seems new and unusual. I have yet to see a name for this phenomena, though I am sure it exists.

With all of the attention paid to Mauna Kea this year, I really expect this sort of thing to happen again… And again… And…

Summer Solstice

Summer solstice occurs today at 06:38HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

2015 Solstices and Equinoxes
  UT HST
Perihelion Jan 4 08:59UT Jan 3 22:59HST
Vernal Equinox Mar 20 22:45UT Mar 20 12:45HST
Summer Solstice Jun 21 16:38UT Jun 21 06:38HST
Apehelion Jul 6 12:59UT Jul 6 02:59HST
Autumnal Equinox Sep 23 08:20UT Sep 22 22:20HST
Winter Solstice Dec 22 04:48UT Dec 21 18:48HST
 
Source: NASA Sky Calendar

 

Summer Solstice

Summer solstice occurs today at 00:52HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

2014 Solstices and Equinoxes
  UT HST
Perihelion Jan 4 05:59UT Jan 3 19:59HST
Vernal Equinox Mar 20 16:57UT Mar 20 06:57HST
Summer Solstice Jun 21 10:52UT Jun 21 00:52HST
Apehelion Jul 3 22:59UT Jul 3 12:59HST
Autumnal Equinox Sep 23 02:30UT Sep 22 16:30HST
Winter Solstice Dec 21 23:03UT Dec 21 13:03HST
 
Source: NASA Sky Calendar

 

Summer Solstice

Summer solstice occurs today at 19:04HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere. Alternately this is the first day of winter for those living south of the equator.

Many calendars will mark Jun 21 as the beginning of summer this year, this is correct for much of the world. Here in Hawaii the solstice will occur on the 20th when correcting for the time zone difference.

2013 Solstices and Equinoxes
  UT HST
Perihelion Jan 2 00:59UT Jan 1 14:59HST
Spring Equinox Mar 20 11:02UT Mar 20 01:02HST
Summer Solstice Jun 21 05:04UT Jun 20 19:04HST
Apehelion Jul 5 18:59UT Jul 5 08:59HST
Fall Equinox Sep 22 20:44UT Sep 22 10:44HST
Winter Solstice Dec 21 17:11UT Dec 21 07:11HST
 
Source: NASA Sky Calendar

 

Summer Solstice

Summer solstice occurs today at 13:09HST. Today the Sun will occupy the most northerly position in the sky of the year. The term solstice comes from the latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving northwards each day and begins move to the south. This is the first day of summer as marked by many cultures in the northern hemisphere.

2012 Solstices and Equinoxes
  UT HST
Perihelion Jan 5 03:59UT Jan 4 17:59HST
Spring Equinox Mar 20 05:14UT Mar 19 19:14HST
Summer Solstice Jun 20 23:09UT Jun 20 13:09HST
Apehelion Jul 4 23:59UT Jul 4 13:59HST
Fall Equinox Sep 22 14:49UT Sep 22 04:49HST
Winter Solstice Dec 21 11:12UT Dec 21 01:12HST
 
Source: USNO Data Services Website and the NASA Sky Calendar