The 1999 Hector Mine earthquake occurred in Southern California, United States, on October 16 at 02:46:50 PDT. Its moment magnitude was 7.1 and the earthquake was preceded by 12 foreshocks, the largest of which had a magnitude of 3.8. The event is thought to have been triggered by the 1992 Landers earthquake which occurred seven years earlier. It also deformed nearby faults vertically and horizontally. The earthquake's hypocenter was at a depth of 20 kilometers and its epicenter at 34.603° N 116.265° W.
The 2006 Borujerd earthquake occurred in the early morning of 31 March in the South of Borujerd with destruction in Borujerd, Silakhor and Dorood areas of the Loristan Province in western Iran. The centre of the earthquake was in Darb-e Astaneh village south of the Borujerd City. The earthquake measured 6.1 on the moment magnitude scale.
The 1918 San Fermín earthquake, also known as the Puerto Rico earthquake of 1918, struck the island of Puerto Rico at on October 11. The earthquake measured 7.1 on the moment magnitude scale and IX (Violent) on the Mercalli intensity scale. The mainshock epicenter occurred off the northwestern coast of the island, somewhere along the Puerto Rico Trench.
The 1913 Asmara earthquake took place outside Asmara, Eritrea on 27 February. The data as to the magnitude of the earthquake is imprecise due to the frequency and magnitude of aftershocks, but a maximum felt intensity of VI (Strong) on the Mercalli intensity scale was recorded at Asmara. The "felt" area of the earthquake extended into Northern Ethiopia as well as Kassala in Sudan. The earthquake caused significant damage in Asmara (VI), Keren (IV), Massawa (V) and Adi Ugri (V).
The 1927 Crimean earthquakes occurred in the month of June and again in September in the waters of the Black Sea near the Crimean Peninsula. Each of the submarine earthquakes in the sequence triggered tsunami. The June event was moderate relative to the large September 11 event, which had at least one aftershock that also generated a tsunami. Following the large September event, natural gas that was released from the sea floor created flames that were visible along the coastline, and was accompanied by bright flashes and explosions.
The 1933 Diexi earthquake occurred in Diexi, Mao County, Szechwan, Republic of China on August 25 with a moment magnitude of 7.3 and a maximum Mercalli intensity of X (Extreme). With up to 9,300 killed, this was the deadliest earthquake of 1933.
The 1915 Pleasant Valley earthquake occurred at in north-central Nevada. With a moment magnitude of 6.8, a surface wave magnitude of 7.7, and a maximum Mercalli intensity of X (Extreme), it was the strongest earthquake ever recorded in the state.
The 1980 El Asnam earthquake occurred on October 10 at with a moment magnitude of 7.1 and a maximum Mercalli intensity of X (Extreme). The shock occurred in the Algerian town of El Asnam. The shocks were felt over 550 km (340 mi) away, with the initial earthquake lasting 35 seconds. It was the largest earthquake in Algeria, and was followed three hours later by a magnitude 6.2 aftershock. The earthquake created about 42 km (26 mi) of surface rupture and had a vertical slip of up to 4.2 m (14 ft). No foreshocks were recorded. The earthquake was found to have occurred very close to the epicenter of the 1954 Chlef earthquake using joint epicenter determination techniques. It occurred at a previously unknown reverse fault.
The 1984 San Pedro Basin earthquake occurred on June 24 at with a moment magnitude of 6.7 and a maximum Mercalli intensity of VII. The event occurred off the southern coast of the Dominican Republic and resulted in an estimated five fatalities.
The 1971 Bingöl earthquake was a Mw 6.6 earthquake that occurred at on 22 May. It had a surface-wave magnitude of 6.9 and a maximum intensity of VIII (Severe) on the Mercalli intensity scale, killing 755–1,000 people.
The 1935 Digor earthquake occurred on 1 May at Digor, Kars in the Eastern Anatolia region of Turkey. It had a moment magnitude of 6.1 and caused 540 fatalities.
The 1997 Cariaco earthquake occurred on July 9 at with a moment magnitude of 6.9 and a maximum Mercalli intensity of VIII (Severe). With its epicenter near Cariaco, Venezuela, at least 81 people were killed and over 500 were injured. Disruption of power, telephone, and water services was reported. This earthquake was felt in much of northeastern Venezuela and could also be felt in Trinidad and Tobago. This earthquake was on the strike-slip El Pilar Fault.
The 1954 Chlef earthquake struck Chlef Province in Algeria on September 9 at . The shock measured 6.7 on the moment magnitude scale and had a maximum Mercalli intensity of XI (Extreme). It destroyed Chlef, then named Orléansville, leaving over 1,243 people dead and 5,000 injured. Damage was estimated at $6 million. It was followed by multiple aftershocks. Algeria faces annual earthquakes and has undergone several changes to its earthquake building codes since its first earthquake engineering regulations from 1717.
The 1989 Chenoua earthquake occurred on October 29 at in northern Algeria. The dip-slip event had a moment magnitude of 5.9 and a maximum Mercalli intensity of VIII (Severe). At least 22 were killed and many were injured with total losses of $5 million.
The 1918 San Jacinto earthquake occurred in extreme eastern San Diego County in Southern California on April 21 at . The shock had a moment magnitude of 6.7 and a maximum Mercalli intensity of IX (Violent). Several injuries and one death occurred with total losses estimated to be $200,000.
The 1990 Upland earthquake occurred at on February 28 with a moment magnitude of 5.7 and a maximum Mercalli Intensity of VII. This left-lateral strike-slip earthquake occurred west of the San Andreas Fault System and injured thirty people, with total losses of $12.7 million. Many strong motion instruments captured the event, with an unexpectedly high value seen on water tank near the epicentral area.
The 1963 Marj earthquake occurred on February 21 in northern Libya. The earthquake occurred at with a moment magnitude of 5.6 and a maximum Mercalli intensity of VIII (Severe). Financial losses totaled $5 million USD, with 290–375 deaths, 375–500 injuries, and 12,000 homeless.
The 1933 Sumatra earthquake or Liwa earthquake occurred in West Lampung Regency, Lampung Province, Indonesia on June 25. The earthquake had an estimated surface-wave magnitude (Ms ) of 7.7 occurring at a shallow depth of 20 km. It had an epicenter onshore, devastating the city of Liwa. At least 76 people were reported killed, although the death toll may have been in the thousands. Aftershocks followed, including one which was strong enough to cause additional fatalities. The mainshock also triggered a nearby volcanic eruption two weeks later, killing some people.
The 1979 Yapen earthquake occurred on September 12 at 05:17:51 UTC. It had an epicenter near the coast of Yapen Island in Irian Jaya, Indonesia. Measuring 7.5 on the moment magnitude scale and having a depth of 20 km (12 mi), it caused severe damage on the island. At least 115 were killed due to shaking and a moderate tsunami.
The February 2004 Nabire earthquakes began on February 6 at 06.05 WIT in Papua, Indonesia. The first of three large earthquakes measured 7.0 on the moment magnitude scale (Mw ). It was followed a few days later by two strong shocks, measuring Mw 7.3 and 6.7, respectively. The earthquakes were felt at Nabire with a maximum Mercalli intensity of VI (Strong). At least 37 people were killed and were 682 injured, and over 2,600 buildings were damaged or destroyed.
