They  are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle.
Anything that causes itchiness of the skin can lead to the development of hot spots on dogs. Some common triggers are atopy (allergies to things in the environment such as grasses, trees, weeds, dust mites, etc), food allergies, fleas, mites, insect bites and skin wounds. Hot spots are an irritating skin condition that affects countless dogs every year. Here, Dr. Henry Cerny, DVM, MS of Yankee Hill Veterinary Hospital, answers some common questions about hot spots. Hotspots. In geology, the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle. They may be on, near to, or far from tectonic plate boundaries. A. Hot spots, also known as acute moist dermatitis, are red, moist, hot and irritated lesions that are typically found on a dog ’s head, hip or chest area. Hot spots often grow at an alarming rate within a short period of time because dogs tend to lick, chew and scratch the affected areas, further irritating the skin. The following tips may aid in the prevention of hot spots: 1  Make sure your dog is groomed on a regular basis. 2  You may also want to keep your pet’s hair clipped short, especially during warmer months. 3  Follow a strict flea control program as recommended by your veterinarian. Most hotspot volcanoes are basaltic (e.g., Hawaii, Tahiti). As a result, they are less explosive than subduction zone volcanoes, in which water is trapped under the overriding plate. Where hotspots occur in continental regions, basaltic magma rises through the continental crust, which melts to form rhyolites. It was later postulated that hotspots are fed by narrow streams of hot mantle rising from the Earth's core–mantle boundary in a structure called a mantle plume. Whether or not such mantle plumes exist is currently the subject of a major controversy in Earth science. Mantle plumes are areas of hot, upwelling mantle. A hot spot develops above the plume. Magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's surface. As oceanic volcanoes move away from the hot spot, they cool and subside, producing older islands, atolls, and seamounts. As continental volcanoes move away from the hot spot, they cool, subside, and become extinct. Hot spots are places within the mantle where rocks melt to generate magma. The presence of a hot spot is inferred by anomalous volcanism (i.e. not at a plate boundary), such as the Hawaiian volcanoes within the Pacific Plat Diagram showing a cross section though the Earth's lithosphere (in yellow) with magma rising from the mantle (in red). In geology, the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle. They may be on, near to, or far from tectonic plate boundaries. Currently, there are two hypotheses that attempt to explain their origins. It was later postulated that hotspots are fed by narrow streams of hot mantle rising from the Earth's core–mantle boundary in a structure called a mantle plume. Whether or not such mantle plumes exist is currently the subject of a major controversy in Earth science. Hotspots typically use Wi-Fi technology. Hotspots may be found in coffee shops and various other public establishments in many developed urban areas throughout the world. A hotspot is differentiated from a wireless access point, which is the hardware device used to provide the wireless network service. Free hotspots operate in two ways: 1  Using an open public network is the easiest way to create a free hotspot. 2  Closed public networks use a HotSpot Management System to control access to hotspots. Security is a serious concern in connection with Hotspots. There are three possible attack vectors. First, there is the wireless connection between the client and the access point. This needs to be encrypted, so that the connection cannot be eavesdropped or attacked by a man-in-the-middle-attack. Free hotspots operate in two ways: 1  Using an open public network is the easiest way to create a free hotspot. 2  Closed public networks use a HotSpot Management System to control access to hotspots. A volcanic hotspot is an area in the mantle from which heat rises as a thermal plume from deep in the Earth. High heat and lower pressure at the base of the lithosphere (tectonic plate) facilitates melting of the rock. This melt, called magma, rises through cracks and erupts to form volcanoes. Hotspots. 1  For background on this animation series, download Background from the Resources box. 2  Animations are available for preview in embedded YouTube. 3  To download, right click the 'Quicktime Animation' link and choose 'Save Target As' (PC) or 'Download Linked File' (Mac). Definition: A hotspot is any location where Wi-Fi network access (usually Internet access) is made publicly available. You can often find hotspots in airports, hotels, coffee shops, and other places where business people tend to congregate. 
https://www.cesarsway.com/dog-care/skin-care/hot-spots-faq http://www.bbc.co.uk/science/earth/surface_and_interior/hotspot http://pets.webmd.com/dogs/what-hot-spots-dogs https://en.wikipedia.org/wiki/Hotspot_(geology) http://volcano.oregonstate.edu/what-is-a-hot-spot https://en.wikipedia.org/wiki/Hotspot_(geology) https://en.wikipedia.org/wiki/Hotspot_%28Wi-Fi%29 https://en.wikipedia.org/wiki/Hotspot_%28Wi-Fi%29 http://www.iris.edu/hq/programs/education_and_outreach/animations/21 http://compnetworking.about.com/cs/wireless/g/bldef_hotspot.htm
what are hotspots