Damavand-Shemiranat Earthquake of 27 March 1830, Ms=7.1
Damavand-Shemiranat Earthquake of 27 March 1830, Ms=7.1
On the morning of March 27, 1830, a major earthquake in southern Mazandaran almost totally destroyed the districts of Shemiranat and Damavand, east of Tehran. About 70 villages lying eastward of the Jajrud, along the routs via Damavand to Semnan and Damghan, were ruined and more than 500 people were killed in Damavand alone. Damage extended to Jajrud, where the caravanserai was shattered and in Tehran many old houses collapsed killing about 30 people. Not a single house in the capital escaped damage and part of the palace, together with many adjoining houses and part of the bazaar, were thrown down. The Arg, the Great Audience hall, a number of mansions, as well as the old British Embassy building, were badly damaged and garden walls were leveled with the ground. The loss of property in Tehran was estimated at halt of a million tomans. The shock caused some damage to a number of public buildings in Amol, Sari and Damghan and triggered rockfalls that blocked the passes on the Haraz and talar-rud roads to the north. The earthquake was felt at Baku and was followed by violent aftershocks that caused additional damage in the Shemiranat region and great panic in Tehran, where a large proportion of the population camped in tents. The royal court also encamped in the open courts of the Arg, The aftershock of 6 April totally destroyed the old caravanserai at Jajrud.
Bozqush Earthquake of 22 March 1879, Ms=6.7
Bozqush Earthquake of 22 March 1879, Ms=6.7
The earthquake ruined many villages north of Miyaneh and killed more than 2000 people at the southern and eastern foothills of the Bozqush Mountains in northwest Iran. After finding a 2-km-long section exposure of a recent fault in the area about 1 km north of Sarighamish, located in the meizoseismal area of the earthquake, Berberian (1976c) reported that the fault could have been associated with the 1879 earthquake. The fault was described as a high-angle reverse fault with an approximate strike of N170E and dip of 75°SW. The southwestern block, which is composed of silicified allunite-bearing breccia of Miocene age, is thrust over the northeaster Quaternary alluvial deposits with a 3-m-thick gauge zone. The 1976 observed short section could be a part of a nearly N–S Germirud fault with a length of about 60 km. The 1879 event might have occurred on either the Germirud fault or the eastern section of the nearly E–W to NE–SW South Bozqush fault system, which also shows active escarpments. The NE–SW (N30°E) elongated meizoseismal area of the 1879 earthquake proposed by Ambraseys and Melville (1982) follows neither the South Bozqush nor the Germirud faults. An angle of 140° exists between the long axes of meizoseismal area and the reported azimuth of the faulting reported by Ambraseys and Melville (1982). The case requires further field investigation and paleoseismic trench study along both faults. The seismic sequence in this region started with the 30 December 1863 M 6.1 earthquake along the northern segment of the Sangavar fault. Sixteen years later, seismicity migrated cross-fault to the southwest with the 1879 Ms6.7 SE Bozqush earthquake. Seventeen years later, the seismicity migrated to the east with the 4 January 1896 Ms6.7 earthquake along the southern segment of the Sangavar fault.
The most important worldwide earthquakes (M>7) of this day
| Date | Time | Y | X | Depth | Mw | Region | Refrence |
| 1879/3/22 | – | 37.80 | 47.90 | 6.7 | Bozghosh | Amb | |
| 1903/3/22 | 14:35:0 | 35 | 60 | 0 | 6.2 | Derakhsh | Amb |
| 1928/3/22 | 4:17:05 | 16.142 | -96.107 | 15 | 7.6 | Oaxaca, Mexico | USGS |
| 1955/3/22 | 14:05:09 | -9.101 | 91.653 | 20 | 7 | South Indian Ocean | USGS |
| 1977/3/22 | 11:57:30 | 27.579 | 56.465 | 39 | 6 | – | NEIC |
Talarrud Earthquake of 4 March 1935, Mw=6
Talarrud Earthquake of 4 March 1935, Mw=6
In the early afternoon of 4 March 1935, an earthquake with a magnitude of M=6 occurred in the East of Talarrud region with the epicentral coordinates of 35.91N and 53.21E. The earthquake ruined 8 sparsely populated villages in the Mazandaran province, damaging 19 other villages and killing about 60 people. The event also made intensive damages to the railway line which was under-construction in the Talarrud Valley. In addition, many rockfalls blocked the road out of the valley, killing 46 workers. The earthquakes was felt in great distances, mainly to the northwest, in the Shahsavar and Gorgan and throughout the south coast of the Caspian sea.
Golestan-Ardebil Earthquake of 28 February 1997, Mw 6.1
Golestan-Ardebil Earthquake of 28 February 1997, Mw 6.1
On February 28, 1997, a devastating earthquake with magnitude Mw=6.1 occurred in the southwestern part of the Sareyn city in the Ardebil province. The epicentral coordinates of the earthquake was located in 33.6N and 45.7E. Based on CMT moment tensor solution, the causative fault plane could be either an E-W right lateral or a N-S left lateral strike slip fault, whereas the recognition of the causative fault plane is impossible due to the lack of a surface rupture and also large error in location of aftershocks. The calculated maximum dislocation was about 27 cm and the stress drop was estimated to be 149 bar. At least, 965 people were killed, more than 2000 injured, 36,000 were homeless, 12,000 houses damaged or destroyed and 160,000 livestock were killed in the Ardabil area of northwestern Iran. Severe damage was observed to roads, electrical power lines, communications and water distribution systems around Ardabil. Hospitals and other medical buildings were overflowing with patients as a result of the earthquake. More than 83 villages experienced some form of damage. 25 accelerographs have recorded this earthquake. The focal depth of this event was reported to be 15km. The peak horizontal acceleration (0.615g) is recorded in a hypocentral distance of 23Km. The capital city of Ardebil was located in a hypocentral distance of about 38km and the site condition was indicative for soft soils. The higher damages in Ardebil (about 40km hypocentral distance) could be related to the soft soil site conditions.
The most important worldwide earthquakes on this day
| Date | Time | Y | X | Depth | Mw | Region | Refrence |
| 1102/2/28 | 18 | 34.40 | 62.20 | – | 5.3 | Harat | Amb |
| 1102/2/28 | – | 35.00 | 62.10 | – | 6.1 | – | NOAA |
| 1915/2/28 | 18:59:12 | 23.359 | 123.492 | 20 | 7.3 | southwestern Ryukyu Islands, Japan | USGS |
| 1950/2/28 | 10:21:00 | 45.882 | 143.491 | 329 | 7.7 | Hokkaido, Japan region | USGS |
| 1969/2/28 | 2:40:32 | 36.033 | -10.613 | 10 | 7.8 | Azores-Cape St. Vincent Ridge | USGS |
| 1997/2/28 | 12:57:18 | 38.075 | 48.05 | 10 | 6.1 | Golestan-Ardebil | NEIC |
| 2006/2/28 | 7:31:3 | 28.18 | 56.76 | 18 | 5.9 | – | IIEES |
Jebal Earthquake of 27 February 1130, Ms 6.8
Jebal Earthquake of 27 February 1130, Ms 6.8
In the early evening of February 27, 1130, a devastating earthquake with magnitude Ms=6.8 occurred in the western Zagros with the epicentral coordinates of 33.6N and 45.7E. The earthquake caused extensive damages in Algeria, in Iraq to Mosul, and in the Jebal mountains. In Baghdad, the slow ground motions that lasted for a long time, caused the collapse of homes in the eastern and western parts, without any casualties. Aftershocks continued for days.
The most important worldwide earthquakes on this day
| Date | Time | Y | X | Depth | Mw | Region | Refrence |
| 1130/2/27 | 18 | 33.60 | 45.70 | – | 6.8 | Jebal | Amb |
| 1916/2/27 | 20:21:14 | 11.542 | -87.99 | 15 | 7.2 | near the coast of Nicaragua | USGS |
| 1997/2/27 | 21:08:02 | 29.976 | 68.208 | 33 | 7.1 | Pakistan | USGS |
| 2015/2/27 | 13:45:05 | -7.2968 | 122.5348 | 552.06 | 7 | 130km N of Nebe, Indonesia | USGS |
Khoy Earthquake of 24 February 1900, Ms 5.4
Khoy Earthquake of 24 February 1900, Ms 5.4
On February 24, 1900, an earthquake near the city of Khoy destroyed several villages including Amir Beyg, Emam Kandi, Quruq, Shirin Kandi and the region of Sofla Kuh, killing several people. The magnitude of the earthquake was estimated Ms=5.4 and its epicentral coordinates was located in 38.45N and 44.87E. In Khoy, all the homes and shops were damaged and the walls of the fort collapsed. The quake was felt in Salmas and Ordubad. The Aftershock sequence continued for months among them the strongest aftershock occurred on March 14. The earthquake damage was extensive and forced people to leave their homes and stay in tents.
The most important worldwide earthquakes (M>7) on this day
| Date | Time | Y | X | Depth | Mw | Region | Refrence |
| 1934/2/24 | 6:23:48 | 23.064 | 143.971 | 35 | 7.5 | Volcano Islands, Japan region | USGS |
| 1988/2/24 | 3:52:03 | 13.477 | 124.616 | 24.9 | 7.3 | Catanduanes, Philippines | USGS |
| 1994/2/24 | 0:11:12 | 30.775 | 60.495 | 9 | 6.3 | Sefidabeh-2nd EQ E. Iran | NEIC |
| 2001/2/24 | 7:23:49 | 1.271 | 126.249 | 35 | 7.1 | Molucca Sea | USGS |