What are the “Signs” of the Second Coming of the Son of Man?
Matthew 24:  And as he sat upon the Mount of Olives, the disciples came unto him privately, saying, Tell us, when shall these things be? And what shall be the sign of thy coming, and of the end of the world?  And then shall appear the sign of the Son of Man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of Man coming in the clouds of heaven with power and great glory.
Mark 13:  Tell us, when shall these things be? And what shall be the sign when all these things shall be fulfilled?
Luke 21:  And they asked him, saying, Master, but when shall these things be? And what sign will there be when these things shall come to pass?  And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven.  And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity; the sea and the waves roaring;.
Joel 2:  And I will show wonders in the heavens and in the earth, blood, and fire, and pillars of smoke.  The sun shall be turned into darkness, and the moon into blood, before the great and the terrible day of the LORD come.  And it shall come to pass, that whosoever shall call on the name of the LORD shall be delivered: for in mount Zion and in Jerusalem shall be deliverance, as the LORD hath said, and in the remnant whom the LORD shall call.
Acts 2:  And I will show wonders in heaven above, and signs in the earth beneath; blood, and fire, and vapor of smoke:  The sun shall be turned into darkness, and the moon into blood, before that great and notable day of the Lord come:  And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved.
The coming of the Son of Man will be associated with great earthquakes, famines, pestilences, fearful sights and great signs from heaven, wonders in the earth related to blood, fire and pillar of smoke, the sun will became darken and the moon into blood. All of these things give a picture of a disruption of the normal pattern of life on the earth. The famine and pestilences are affects upon human beings; while the great earthquakes, the blood (volcanic lava), fire and vapor of smoke (volcanic ash cloud), the sun being darken and the moon appearing to be like blood, are the results of the shifting of the Tectonic Plates of the earth, which in turn cause volcanic eruptions and the ash cloud obstructs the view of the sun and the moon. The view of the sun will become darker and the moon will appear red as a person views them through the dense volcanic ash clouds that will eventually encircle the entire planet earth.
The following are several articles from the Internet about the sun going into a Grand Solar Minimum:
You may have recently heard the term grand solar minimum and Maunder minimum bandied around by the media lately, but what are they talking about? And should we be worried about another Little Ice Age approaching? Well, there are two types of solar minimum. One of them ordinarily happens about every eleven years. In the simplest terms, a solar minimum phase is a period of time in which the sun’s activity is reduced to its lowest level and there are very few sunspots. NASA predicts that the next solar minimum will be during 2019-2020. An ordinary solar minimum phase can have effects like geomagnetic storms, auroras, and disruptions to communications and navigation systems. All in all, it’s nothing catastrophic, although solar minimums have been linked to colder and more eventful winters. A grand solar minimum isn’t your average, every-11-year solar minimum. It’s been likened to a mini-Ice Age. A grand solar minimum can make the sun appear a little dimmer and can make the planet a little cooler.
A new study predicts that the next grand solar minimum could see the sun with almost a 7% reduction in light and heat – and this is 7% below the normal solar minimum. Historians believe that a grand solar minimum occurred between 1645 and 1715. That event was named the Maunder Minimum after the scientists who studied it at the time. It got so cold that the Thames River in England froze solid. The Baltic Sea also froze and the Swedes were able to invade the Danes by marching across the frozen sea. The Maunder minimum coincided with the coldest part of the “Little Ice Age” (c. 1500–1850) in the Northern Hemisphere.
The “Little Ice Age” was linked to all sorts of events during the time period. Thousands of people in Europe particularly were wiped out. The time period was host to the Great Plague, terrible famines, wars, revolutions, witch hunts, and more. Valentina Zharkova, a professor of mathematics at Northumbria University in the United Kingdom, believes we could potentially be headed toward another multiple-decade grand solar minimum as seen in the middle ages and has been warning people for years. What would happen during another grand solar minimum? While countless people died during the previous grand solar minimums cited above, I believe it’s less likely to affect us so dramatically now. We’d probably see shorter growing seasons, longer and bitterly cold winters, and cool summers. While it seems very survivable, it has the potential for a damaging effect on our economy.
Theoretical astrophysicist Valentina Zharkova, lead author of the study that reproduced the summary curve of solar activity for the last 3,000 years and predicted Modern grand minimum in 2020 – 2055.
The Little Ice Age was a period of cooling… The NASA Earth Observatory notes three particularly cold intervals: one beginning about 1650, another about 1770, and the last in 1850… Several causes have been proposed: cyclical lows in solar radiation, heightened volcanic activity, changes in the ocean circulation, variations in Earth’s orbit and axial tilt (orbital forcing), inherent variability in global climate, and decreases in the human population… A recent study found that an especially massive tropical volcanic eruption in 1257, possibly of the now-extinct Mount Samalas near Mount Rinjani, both in Lombok, Indonesia, followed by three smaller eruptions in 1268, 1275, and 1284 did not allow the climate to recover. This may have caused the initial cooling, and the 1452–53 eruption of Kuwae in Vanuatu triggered a second pulse of cooling. The cold summers can be maintained by sea-ice/ocean feedbacks long after volcanic aerosols are removed. Other volcanoes that erupted during the era and may have contributed to the cooling include Billy Mitchell (ca. 1580), Huaynaputina (1600), Mount Parker (1641), Long Island (Papua New Guinea) (ca. 1660), and Laki (1783). The 1815 eruption of Tambora, also in Indonesia, blanketed the atmosphere with ash; the following year, 1816, came to be known as the Year without a Summer, when frost and snow were reported in June and July in both New England and Northern Europe. https://en.wikipedia.org/wiki/Little_Ice_Age
The cause of the Little Ice Age is not known for certain; however, climatologists contend that reduced solar output, changes in atmospheric circulation, and explosive volcanism may have played roles in bringing about and extending the phenomenon. Cool conditions in different regions during the Little Ice Age may have been influenced by explosive volcanic eruptions, such as the eruptions of Laki in Iceland in 1783 and Tambora on Sumbawa Island in 1815. Explosive eruptions propel gases and ash into the stratosphere, where they reflect incoming solar radiation. Consequently, they have been linked to conditions of lower average temperature around the world that may last a few years. https://www.britannica.com/science/Little-Ice-Age
The Little Ice Age coincides with the pre-industrial period. The Little Ice Age spanned a period from 1300 AD to 1850 AD, but the exact timing varies. It was a time of great droughts, retreating tree lines, and agricultural failures leading to massive global famines and rampant epidemics. Meanwhile advancing glaciers demolished European villages and farms and extensive sea ice blocked harbors and prevented trade. Dr. Michael Mann who preaches dire predictions wrought by global warming described the Little Ice Age as a period of widespread “famine, disease, and increased child mortality in Europe during the 17th–19th century, probably related, at least in part, to colder temperatures and altered weather conditions.” In contrast to current models suggesting global warming will cause wild weather swings, Mann concluded “the Little Ice Age may have been more significant in terms of increased variability of the climate”. Indeed, historical documents from the Little Ice Age describe wild climate swings with extremely cold winters followed by very warm summers, and cold wet years followed by cold dry years. A series of Little Ice Age droughts lasting several decades devastated Asia between the mid-1300s and 1400s. Resulting famines caused significant societal upheaval within India, China, Sri Lanka, and Cambodia. Bad weather resulted in the Great Famine of 1315-1317 which decimated Europe causing extreme levels of crime, disease, mass death, cannibalism and infanticide. The North American tree-ring data reveal megadroughts lasting several decades during the cool 1500s. The Victorian Great Drought from 1876 to 1878 brought great suffering across much of the tropics with India devastated the most. More than 30 million people are thought to have died at this time from famine worldwide. The Little Ice Age droughts and famines forced great societal upheaval, and the resulting climate change refugees were forced to seek better lands. But those movements also spread horrendous epidemics. Wild climate swings brought cold and dry weather to central Asia. That forced the Mongols to search for better grazing. As they invaded new territories they spread the Bubonic plague which had devastated parts of Asia earlier. In the 1300s the Mongols passed the plague to Italian merchant ships who then brought it to Europe where it quickly killed one third of Europe’s population. European explorers looking for new trade routes brought smallpox to the Americas, causing small native tribes to go extinct and decimating 25% to 50% of larger tribes. Introduced diseases rapidly reduced Mexico’s population from 30 million to 3 million.
The Old Testament and New Testament inform us of a time period just before the Son of Man would return to the earth to establish His Millennial Reign, as there are countless Scriptures that refer to this time period. For the past 2,000 years there have been various changes in the earth due to Solar Activity, Earthquakes and Volcanic Eruptions. These events have had a tremendous effect upon the population throughout these years. There have been many different famines and pestilences that have cause havoc across the countries of the world.
Nevertheless, there is one factor that adds to this time period that never existed in the past and that is the formation of a “Ten Arab Caliphate/Kingdom” in the Middle East.
The Great Tribulation Period is totally associated with the “Ten Arab/Caliphate Kingdom”. In other words, when the “Ten Arab/Caliphate Kingdom” which also could be called a “Ten Arab/Islamic Caliphate” is formed, including the Planetary Alignment in June, July and August in 2020, alongside the Grand Solar Minimum, starting in 2020, then when these three events come into play, then when the Earthquake that splits the Mount of Olives, the stage for the Great Tribulation Period will begin!!!