I think this was the last big one it had too… back in 03, right before they found the plume..
[link to asc-india.org
Date - 15 July 2003
Origin Time - 20:27:50 UTC
Latitude - 02.560 S (NEIC)
Longitude - 68.300 E (NEIC)
Depth (kms) - 10.0 kms (NEIC)
Magnitude - M 7.6 (GS), Mw7.6 (HRV), Mw 7.8 (EMSC), Mw 7.4 (CalTech)
Location - 485 kms NW of Perhos Banhos, B.I.O.T.
Flinn-Engdahl Region - CARLSBERG RIDGE
ASC Region - -
Additional Info. - Did You Feel it ?
A powerful earthquake struck the Carlsberg Ridge, in the northern Indian Ocean on 15 July 2003. It had a magnitude of 7.6 and was the strongest earthquake in this general area since 1983.
The earthquake was centred 485 kms NW of Perhos Banhos, B.I.O.T.,
Or 575 kms SE of Hittadu (Hittadi Island), Maldives,
Or 689 kms NW of Simpson Point (Diogo Garcia), B.I.O.T.,
Or 946 kms SSW of Male (Male), Maldives,
Or 1448 kms NNE of Victoria, Seychelles.
Tremors from this submarine earthquake were experienced in many parts of the Maldives. Strong tremors (MM VI) were felt on Feydhoo Island in Addu Atoll in the southern Maldives. Everyone was awakened by the shock and ran outdoors. Doors, windows and in some cases, the roofs of houses rattled violently. Several houses in Addu Atoll developed cracks including the walls of the Feydhoo School. Many residents of the atoll spent the night outdoors. Strong tremors (MM V) were also felt in Gaafu Alifu, Gaafu Dhalu and Fuah Mulah. An eyewitness on Fuah Mulah reported seeing a large mango tree sway back and forth during the earthquake. A few old cracks were also widened by the tremors on Dhaandhoo Island (MM V) in Gaafu Alifu Atoll. Tremors were felt in the capital, Male (MM IV-V) and many residents were woken up. Tremors were also experienced in the Huvadhu and South Huvadhu Atolls for close to two minutes. There are not reports of casualties from the Maldives.
According to an official with the Maldives government, no unsual tides were reported from anywhere in the islands. Focal mechanisms (HRV and CalTech) indicate a strike-slip event. No Indian Ocean-wide tsunami activity is expected due to the mechanism of this event.
The last major earthquake in this immediate area was an M7.7 event on 30th November 1983 and was centred near the island of Diogo Garcia in the British Indian Ocean Territory (BIOT) just to the south of the Maldives. That earthquake generated a small tsunami that was recorded as far as the Seychelles.