The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain.
The Gulf of Bothnia is divided into the Bothnian Bay and Bothnian Sea, and it is the northernmost arm of the Baltic Sea, between Finland's west coast and the Sweden's east coast. In the south of the gulf lies Åland, between the Sea of Åland and the Archipelago Sea.
Ostrobothnia, Swedish: Österbotten, Finnish: Pohjanmaa is a historical province comprising a large western and northern part of modern Finland. It is bounded by Karelia, Savonia, Tavastia and Satakunta in the south, the Bothnian Sea, Bothnian Bay and Swedish Westrobothnia in the west, Laponia in the north and Russia in the east.
Kvenland, known as Cwenland, Qwenland, Kænland, and similar terms in medieval sources, is an ancient name for an area in Fennoscandia and Scandinavia. Kvenland, in that or nearly that spelling, is known from an Old English account written in the 9th century, which used information provided by Norwegian adventurer and traveler Ohthere, and from Nordic sources, primarily Icelandic. A possible additional source was written in the modern-day area of Norway. All known Nordic sources date from the 12th and 13th centuries. Other possible references to Kvenland by other names and spellings are also discussed here.
Hailuoto is a Finnish island in the northern Baltic Sea and a municipality in Northern Ostrobothnia region. The population of Hailuoto is 949, which make it the smallest municipality in Northern Ostrobothnia and the former Oulu Province in terms of population. The municipality covers an area of 200.53 km2 (77.43 sq mi) of which 1.70 km2 (0.66 sq mi) is inland water. The population density is 4.73/km2 (12.3/sq mi). Of all the Finnish sea islands, Hailuoto is the third largest after Fasta Åland and Kimitoön.
Kvarken is the narrow region of the Gulf of Bothnia separating the Bothnian Bay from the Bothnian Sea. The distance from the Swedish mainland to the Finnish mainland is around 80 km (50 mi), while the distance between the outermost islands is only 25 km (16 mi). The water depth in the Kvarken region is only around 25 metres (82 ft). The region also has an unusual rate of land rising at almost 10 mm a year.
The Bothnian Sea links the Bothnian Bay with the Baltic proper. Kvarken is situated between the two. Together, the Bothnian Sea and Bay make up a larger geographical entity, the Gulf of Bothnia, where the Bothnian Sea is the southern part. The whole Gulf of Bothnia is situated between Sweden, to the west, Finland, to the east, and the Sea of Åland and Archipelago Sea to the south. The surface area of the Bothnian Sea is approximately 79,000 square kilometres (30,500 sq mi). The largest coastal towns, from south to north, are Rauma and Pori in Finland, and Gävle and Sundsvall in Sweden. Umeå (Sweden) and Vaasa (Finland) lie in the extreme north, near Bothnian Bay.
The Battle of Gangut took place on 27 JulyJul./ 7 August 1714Greg. during the Great Northern War (1700–1721), in the waters of Riilahti Bay, north of the Hanko Peninsula, near the site of the modern-day city of Hanko, Finland, between the Swedish Navy and Imperial Russian Navy. It was the first important victory of the Russian fleet in its history.
The Bothnian Bay or Bay of Bothnia is the northernmost part of the Gulf of Bothnia, which is in turn the northern part of the Baltic Sea. The land holding the bay is still rising after the weight of ice-age glaciers has been removed, and within 2,000 years the bay will be a large freshwater lake since its link to the south Kvarken is mostly less than 20 metres (66 ft) deep. The bay today is fed by several large rivers, and is relatively unaffected by tides, so has low salinity. It freezes each year for up to six months. Compared to other parts of the Baltic it has little plant or animal life.
The Åland Sea is a waterway in the southern Gulf of Bothnia, between Åland and Sweden. It connects the Bothnian Sea with the Baltic Sea proper. The western part of the basin is in Swedish territorial waters while the eastern part is in Finnish territorial waters.
Holmöarna is an island group in the Kvarken narrows of the Gulf of Bothnia between Sweden and Finland. The islands form part of Umeå Municipality in Västerbotten County. The islands have 75 year-round inhabitants and the largest islands are Holmön, Ängesön, Grossgrunden, Holmögadd and Lilla and Stora Fjäderägg. Large areas of the islands have been set aside as nature reserves.
Töre River is a river in Norrbotten in Sweden. It discharges into Törefjärden, which is the northernmost part of the Bothnian Bay and therefore of the Gulf of Bothnia and of the Baltic Sea.
Fucus radicans is a species of brown algae in the family Fucaceae, endemic to and recently evolved within the Baltic Sea. The species was first described by Lena Bergström and Lena Kautsky in 2005 from a location in Ångermanland, Sweden. The specific epithet is from the Latin and means "rooting", referring to the fact that this species primarily reproduces by the taking root of detached fragments.
The Finland–Sweden border is the border between the countries of Finland and Sweden. Almost the entire border runs through water: along the Tornio River and its tributaries, and in the Gulf of Bothnia. Only a few kilometres of the border are on dry land. Because of the Schengen treaty and the Nordic Passport Union, the border can be crossed mostly freely.
The Norrbotten archipelago is a group of Swedish islands in the north part of the Bay of Bothnia. A few of the islands have small permanent populations, but most are used only for recreation in the summer months. They are icebound during the winter.
Säppi Lighthouse is a lighthouse on the coast of Bothnian Sea, located outside the city of Pori in the island of Säppi. The lighthouse stands approximately 14 kilometers Southwest of the Port of Pori on the area of Eurajoki municipality. It was designed by Finnish architect Axel Hampus Dalström and first lit in 1873.
In north European geology, Jotnian sediments are a group of Precambrian rocks more specifically assigned to the Mesoproterozoic Era (Riphean), albeit some might be younger. Jotnian sediments include the oldest known sediments in the Baltic area that have not been subject to metamorphism. Stratigraphically, Jotnian sediments overlie the rapakivi granites and other igneous and metamorphic rocks and are often intruded by younger diabases.
