Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-10-2021 and time 22:08:46 (UTC) in region 5 km E Amatrice (RI)

A magnitude ML 0.9 earthquake occured in region: 5 km E Amatrice (RI), on

  • 01-10-2021 22:08:46 (UTC)
  • 02-10-2021 00:08:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6330, 13.3560 at 13 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amatrice RI 6 2657 2657
Campotosto AQ 8 542 3199
Accumoli RI 11 667 3866
Cortino TE 13 656 4522
Capitignano AQ 13 665 5187
Crognaleto TE 14 1297 6484
Montereale AQ 15 2581 9065
Rocca Santa Maria TE 15 537 9602
Acquasanta Terme AP 16 2916 12518
Cittareale RI 16 482 13000
Arquata del Tronto AP 16 1178 14178
Valle Castellana TE 16 977 15155
Fano Adriano TE 17 296 15451

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km W of Teramo (54892 inhabitants)
31 Km N of L'Aquila (69753 inhabitants)
59 Km E of Terni (111501 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
73 Km W of Pescara (121014 inhabitants)
74 Km W of Chieti (51815 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
95 Km SE of Perugia (166134 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.9 2021-10-01
22:08:46		 42.6328 13.3563 13 2021-10-01
22:14:49		 Sala Sismica INGV-Roma 96114421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 22:08:46 ± 0.11
Latitude 42.6328 ± 0.0063
Longitude 13.3563 ± 0.0073
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96114421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 562
Semi-minor axis of confidence ellipse (meter) 498
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.01529
Epicentral distance of station farthest from the epicenter (degree) 0.47214
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 96114421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 22:14:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-10-01T22:09:03.22 0.1 undecidable manual S 346 52.4031 93 0.2 90
IV.MF5.EHZ. 2021-10-01T22:09:00.51 0.1 undecidable manual S 12 40.2264 94 0.73 79
IV.NRCA.HHZ. 2021-10-01T22:08:56.44 0.1 undecidable manual S 319 29.748 96 -0.55 83
IV.MMO1.EHZ. 2021-10-01T22:08:56.90 0.1 undecidable manual S 355 29.6481 96 -0.06 95
IV.CSP1.EHZ. 2021-10-01T22:08:55.89 0.1 undecidable manual P 346 52.4031 93 -0.17 89
IV.MF5.EHZ. 2021-10-01T22:08:54.50 0.1 undecidable manual P 12 40.2264 94 0.31 90
IV.TERO.HHZ. 2021-10-01T22:08:54.14 0.1 undecidable manual S 93 20.2686 104 -0.34 93
IV.RM33.EHZ. 2021-10-01T22:08:53.94 0.3 undecidable manual S 220 17.9709 107 0.04 73
IV.CAMP.HHN. 2021-10-01T22:08:52.22 0.1 undecidable manual S 158 11.5773 125 -0.15 98
IV.NRCA.HHZ. 2021-10-01T22:08:52.33 0.1 undecidable manual P 319 29.748 96 -0.25 91
IV.MMO1.EHZ. 2021-10-01T22:08:52.41 0.1 undecidable manual P 355 29.6481 96 -0.16 93
IV.T1299.HNE. 2021-10-01T22:08:51.34 0.1 undecidable manual S 271 6.0939 148 -0.01 100
IV.TERO.HHZ. 2021-10-01T22:08:51.11 0.1 undecidable manual P 93 20.2686 104 -0.03 98
IV.RM33.EHZ. 2021-10-01T22:08:50.97 0.3 positive manual P 220 17.9709 107 0.17 72
IV.SMA1.EHZ. 2021-10-01T22:08:50.87 0.3 undecidable manual S 261 1.6983 170 -0.08 76
IV.CAMP.HHN. 2021-10-01T22:08:50.11 0.3 undecidable manual P 158 11.5773 125 0.19 71
IV.T1299.HNE. 2021-10-01T22:08:49.55 0.1 undecidable manual P 271 6.0939 148 0.22 96
IV.SMA1.EHZ. 2021-10-01T22:08:49.34 0.6 negative manual P 261 1.6983 170 0.25 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.2 0.0001975 0.22 AML other m 2021-10-01T22:08:51.08
IV.SMA1.EHE. ML:1.0 0.0001545 0.6 AML other m 2021-10-01T22:08:51.51
IV.RM33.EHN. ML:0.7 0.00003355 0.74 AML other m 2021-10-01T22:08:54.58
IV.RM33.EHE. ML:0.7 0.00004035 0.56 AML other m 2021-10-01T22:08:54.45
IV.NRCA.HHE. ML:1.0 0.000045350000000000005 0.12 AML other m 2021-10-01T22:08:57.41
IV.NRCA.HHN. ML:0.8 0.0000293 0.76 AML other m 2021-10-01T22:08:57.90
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download