The 1888 North Canterbury earthquake occurred at on 1 September following a sequence of

foreshock A foreshock is an earthquake that occurs before a larger seismic event (the mainshock) and is related to it in both time and space. The designation of an earthquake as ''foreshock'', ''mainshock'' or aftershock is only possible after the full sequ ...

s that started the previous evening, and whose

epicentre The epicenter, epicentre () or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. Surface damage Before the instrumental pe ...

was in the

North Canterbury Canterbury ( mi, Waitaha) is a region of New Zealand, located in the central-eastern South Island. The region covers an area of , making it the largest region in the country by area. It is home to a population of The region in its current fo ...

region of the South Island of New Zealand. The epicentre was approximately west of Hanmer. In

Christchurch Christchurch ( ; mi, Ōtautahi) is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon River / ...

, about southeast of the epicentre, shaking lasted for 40 to 50 seconds. The

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

of the earthquake is estimated to be in the range 7.0–7.3. Severe damage to farm buildings in the epicentral region was reported and the top of the spire of

ChristChurch Cathedral ChristChurch Cathedral, also called Christ Church Cathedral and (rarely) Cathedral Church of Christ, is a deconsecrated Anglican cathedral in the city of Christchurch, New Zealand. It was built between 1864 and 1904 in the centre of the city, ...

collapsed. It was the first earthquake observed to be associated with mainly horizontal fault displacement.

Tectonic setting

New Zealand lies along the boundary between the

Australian Australian(s) may refer to: Australia * Australia, a country * Australians, citizens of the Commonwealth of Australia ** European Australians ** Anglo-Celtic Australians, Australians descended principally from British colonists ** Aboriginal Au ...

and

Pacific Plate The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At , it is the largest tectonic plate. The plate first came into existence 190 million years ago, at the triple junction between the Farallon, Phoenix, and Iza ...

s. In the

South Island The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman ...

, most of the relative displacement between these plates is taken up along a single dextral (right lateral)

strike-slip fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...

with a major

reverse Reverse or reversing may refer to: Arts and media * ''Reverse'' (Eldritch album), 2001 * ''Reverse'' (2009 film), a Polish comedy-drama film * ''Reverse'' (2019 film), an Iranian crime-drama film * ''Reverse'' (Morandi album), 2005 * ''Reverse'' ...

component, the

Alpine Fault The Alpine Fault is a geological fault that runs almost the entire length of New Zealand's South Island (c. 480 km) and forms the boundary between the Pacific Plate and the Indo-Australian Plate. The Southern Alps have been uplifted on the fa ...

. In the

North Island The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-largest ...

, displacement is mainly taken up along the

Kermadec-Tonga subduction zone The Kermadec-Tonga subduction zone is a convergent plate boundary that stretches from the North Island of New Zealand northward. The formation of the Kermadec and Tonga Plates started about 4–5 million years ago. Today, the eastern boundary ...

, although the remaining dextral strike-slip component is accommodated by the

North Island Fault System The North Island Fault System (also known as North Island Dextral Fault Belt or NIFS) is a set of southwest–northeast trending seismically-active faults in the North Island of New Zealand that carry most of the dextral (right lateral) strike- ...

Earthquake

The earthquake occurred on the

Hope Fault The Hope Fault is an active dextral (right lateral) strike-slip fault in the northeastern part of South Island, New Zealand. It forms part of the Marlborough Fault System, which accommodates the transfer of displacement along the oblique convergen ...

, one of the group of dextral strike-slip structures known as the

Marlborough Fault System The Marlborough Fault System is a set of four large dextral strike-slip faults and other related structures in the northern part of South Island, New Zealand, which transfer displacement between the mainly transform plate boundary of the Alpine ...

that transfer displacement between the mainly

transform Transform may refer to: Arts and entertainment * Transform (scratch), a type of scratch used by turntablists * ''Transform'' (Alva Noto album), 2001 * ''Transform'' (Howard Jones album) or the title song, 2019 * ''Transform'' (Powerman 5000 album ...

and convergent type plate boundaries in a complex zone at the northern end of South Island. Alexander McKay, a geologist working for the geological survey, observed horizontal offsets in farm fences between along the fault. He was the first to associate a strike-slip displacement with an earthquake.

Damage

In the North Canterbury region many buildings were severely damaged, particularly in the Hope Valley and Hanmer areas.

Landslide Landslides, also known as landslips, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, deep-seated grade (slope), slope failures, mudflows, and debris flows. Landslides occur in a variety of ...

s occurred in unconsolidated

sediment Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand an ...

and fissures up to wide were observed. In

, the top of the

Cathedral A cathedral is a church that contains the '' cathedra'' () of a bishop, thus serving as the central church of a diocese, conference, or episcopate. Churches with the function of "cathedral" are usually specific to those Christian denomination ...

spire fell down and minor damage, such as broken chimneys, affected many houses. The

Durham Street Methodist Church The Durham Street Methodist Church in Christchurch was the earliest stone church constructed in the Canterbury region of New Zealand. It is registered as a "Historic Place – Category I" by Heritage New Zealand. The church was severely damaged ...

, Christchurch's first church build with permanent materials, suffered some damage to its stonework. Another building affected was the

Christchurch Normal School Cranmer Court, the former Christchurch Normal School, was one of the most significant heritage buildings in Christchurch, New Zealand. Its demolition, due to some damage in the 2011 Christchurch earthquake, was controversial. History The Canter ...

, where chimneys fell down and ceilings were cracked. Damage was greatest in the northern and northwestern suburbs, probably due to the

peat Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficien ...

y sub-soil. One person died of a heart attack during the earthquake.

References

{{DEFAULTSORT:1888 North Canterbury Earthquake Earthquakes in New Zealand North Canterbury Earthquake, 1888 North Canterbury, New Zealand History of Canterbury, New Zealand September 1888 events 1888 disasters in New Zealand

Tectonic setting

Earthquake

Damage

See also

References