Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-12-2020 and time 04:00:12 (Italy) in region 2 km SW Amatrice (RI)

A magnitude ML 1.5 earthquake occured in region: 2 km SW Amatrice (RI), on

  • 27-12-2020 03:00:12 (UTC)
  • 27-12-2020 04:00:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6140, 13.2690 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 3 2657 2657
Cittareale RI 9 482 3139
Accumoli RI 9 667 3806
Montereale AQ 10 2581 6387
Campotosto AQ 10 542 6929
Capitignano AQ 11 665 7594
Borbona RI 16 617 8211
Posta RI 17 694 8905
Cagnano Amiterno AQ 17 1369 10274
Arquata del Tronto AP 18 1178 11452
Barete AQ 18 737 12189
Crognaleto TE 19 1297 13486
Cortino TE 20 656 14142
Pizzoli AQ 20 4326 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
90 Km SE of Perugia (166134 inhabitants)
98 Km E of Viterbo (67173 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
Bulletin
Rev1000 		ML 1.5 2020-12-27
03:00:12		 42.6135 13.2692 11 2021-02-26
14:56:13		 Bollettino Sismico Italiano INGV 85992901
Reviewed
Rev100 		ML 1.5 2020-12-27
03:00:12		 42.6132 13.2677 11 2020-12-27
04:14:32		 Sala Sismica INGV-Roma 85747521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-27 03:00:12 ± 0.08
Latitude 42.6135 ± 0.0045
Longitude 13.2692 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85992901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 569
Semi-minor axis of confidence ellipse (meter) 397
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 58
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.53600
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 85747521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-27 04:14:32

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 85992901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-03 13:33:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T0110.HHN. 2020-12-27T03:00:31.70 0.3 undecidable manual S 136 59.496 50 1.21 47
IV.CSP1.EHZ. 2020-12-27T03:00:29.02 0.6 undecidable manual S 354 53.3022 50 0.18 46
IV.OFFI.HHE. 2020-12-27T03:00:29.74 0.6 undecidable manual S 43 49.2174 50 2 19
IV.GUMA.HNE. 2020-12-27T03:00:28.86 0.3 undecidable manual S 6 50.1165 50 0.88 56
IV.CESI.HNE. 2020-12-27T03:00:28.93 0.6 undecidable manual S 326 52.6029 50 0.28 45
IV.MF5.EHN. 2020-12-27T03:00:27.17 0.6 undecidable manual S 20 44.3223 50 0.73 40
IV.FDMO.HHE. 2020-12-27T03:00:27.89 0.6 undecidable manual S 343 49.2174 50 0.15 47
IV.FIAM.HHE. 2020-12-27T03:00:25.24 0.3 undecidable manual S 198 40.3263 50 -0.12 72
IV.MC2.EHN. 2020-12-27T03:00:23.94 0.6 undecidable manual S 349 33.6441 50 0.34 47
IV.MMO1.EHZ. 2020-12-27T03:00:22.76 0.3 undecidable manual S 8 32.0457 50 -0.4 69
IV.T0110.HHN. 2020-12-27T03:00:22.67 0.3 undecidable manual P 136 59.496 50 -0.03 71
MN.AQU.HHZ. 2020-12-27T03:00:22.89 0.3 undecidable manual S 159 30.8469 50 0.05 75
IV.GAVE.EHZ. 2020-12-27T03:00:22.91 0.1 undecidable manual S 286 31.8459 50 -0.19 96
IV.GIGS.HHE. 2020-12-27T03:00:22.35 0.3 undecidable manual S 126 30.5472 50 -0.41 69
IV.OFFI.HHE. 2020-12-27T03:00:21.92 0.3 undecidable manual P 43 49.2174 50 0.81 58
IV.CESI.HNE. 2020-12-27T03:00:21.47 0.3 undecidable manual P 326 52.6029 50 -0.16 70
IV.TERO.HHZ. 2020-12-27T03:00:21.26 0.1 undecidable manual S 88 27.3504 50 -0.65 86
IV.GUMA.HNE. 2020-12-27T03:00:21.50 0.3 undecidable manual P 6 50.1165 50 0.25 69
IV.NRCA.HHZ. 2020-12-27T03:00:21.35 0.3 undecidable manual S 333 27.4503 50 -0.59 66
IV.CSP1.EHZ. 2020-12-27T03:00:21.50 0.3 undecidable manual P 354 53.3022 50 -0.25 69
IV.FDMO.HHE. 2020-12-27T03:00:20.84 0.3 undecidable manual P 343 49.2174 50 -0.27 69
IV.MF5.EHN. 2020-12-27T03:00:20.66 0.3 undecidable manual P 20 44.3223 50 0.3 69
IV.LNSS.HHZ. 2020-12-27T03:00:19.60 0.3 undecidable manual S 266 18.7701 120 0.07 76
IV.FIAM.HHE. 2020-12-27T03:00:19.87 0.6 undecidable manual P 198 40.3263 50 0.13 48
IV.GAVE.EHZ. 2020-12-27T03:00:18.34 0.3 undecidable manual P 286 31.8459 50 -0.09 74
IV.MC2.EHN. 2020-12-27T03:00:18.56 0.3 undecidable manual P 349 33.6441 50 -0.16 72
IV.MMO1.EHZ. 2020-12-27T03:00:18.22 0.3 undecidable manual P 8 32.0457 50 -0.25 71
IV.CAMP.HHZ. 2020-12-27T03:00:18.07 0.3 undecidable manual S 127 14.2746 127 -0.17 75
MN.AQU.HHZ. 2020-12-27T03:00:18.31 0.3 undecidable manual P 159 30.8469 50 0.03 75
IV.MTRA.HNZ. 2020-12-27T03:00:18.82 0.3 undecidable manual S 33 18.9699 119 -0.79 62
IV.NRCA.HHZ. 2020-12-27T03:00:17.54 0.1 undecidable manual P 333 27.4503 50 -0.22 96
IV.GIGS.HHE. 2020-12-27T03:00:17.98 0.3 undecidable manual P 126 30.5472 50 -0.25 71
IV.TERO.HHZ. 2020-12-27T03:00:17.45 0.3 undecidable manual P 88 27.3504 50 -0.29 71
IV.MTRA.HNZ. 2020-12-27T03:00:16.12 0.3 undecidable manual P 33 18.9699 119 -0.29 72
IV.SMA1.EHZ. 2020-12-27T03:00:16.36 0.3 undecidable manual S 71 5.6943 152 0.11 77
IV.LNSS.HHZ. 2020-12-27T03:00:16.59 0.3 undecidable manual P 266 18.7701 120 0.22 73
IV.CAMP.HHZ. 2020-12-27T03:00:15.75 0.3 undecidable manual P 127 14.2746 127 0.12 76
IV.T1299.HNZ. 2020-12-27T03:00:15.85 0.3 undecidable manual S 25 2.4975 167 0 79
IV.T1299.HNZ. 2020-12-27T03:00:14.50 0.1 undecidable manual P 25 2.4975 167 0.25 100
IV.SMA1.EHZ. 2020-12-27T03:00:14.75 0.1 undecidable manual P 71 5.6943 152 0.27 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.0 0.0015998369000000002 0.1008 AML other m 2020-12-27T03:00:16.86
IV.SMA1.EHE. ML:2.1 0.0020631135 1.8592 AML other m 2020-12-27T03:00:17.00
IV.NRCA.HNN. ML:1.6 0.00022486489999999998 0.88 AML other m 2020-12-27T03:00:17.61
IV.MTRA.EHN. ML:1.8 0.00045599999999999997 1.48 AML other m 2020-12-27T03:00:18.95
IV.MTRA.HNN. ML:1.8 0.0004561358 0.2304 AML other m 2020-12-27T03:00:19.32
IV.MTRA.EHE. ML:1.7 0.000398 0.28 AML other m 2020-12-27T03:00:19.40
IV.MTRA.HNE. ML:1.7 0.0003806795 0.2 AML other m 2020-12-27T03:00:19.40
IV.LNSS.HNN. ML:1.3 0.00014205583500000003 0.1408 AML other m 2020-12-27T03:00:20.31
IV.LNSS.HNE. ML:1.3 0.000159655835 0.1184 AML other m 2020-12-27T03:00:20.48
IV.LNSS.HHE. ML:1.3 0.00016225685000000002 0.1392 AML other m 2020-12-27T03:00:20.49
IV.LNSS.HHN. ML:1.4 0.00019219835000000002 0.3408 AML other m 2020-12-27T03:00:20.89
IV.TERO.HNN. ML:1.1 0.00006602625000000001 0.0688 AML other m 2020-12-27T03:00:21.59
IV.NRCA.HHE. ML:1.7 0.0002593917 0.1408 AML other m 2020-12-27T03:00:22.12
IV.NRCA.HNE. ML:1.7 0.00026148760000000007 0.1504 AML other m 2020-12-27T03:00:22.12
IV.TERO.HNE. ML:1.0 0.000056972963000000004 0.0608 AML other m 2020-12-27T03:00:22.25
IV.TERO.HHN. ML:1.2 0.000077889285 0.08 AML other m 2020-12-27T03:00:22.51
IV.NRCA.HHN. ML:1.6 0.00019448545 0.0992 AML other m 2020-12-27T03:00:23.07
IV.GAVE.EHN. ML:1.4 0.000099273215 0.28 AML other m 2020-12-27T03:00:23.30
IV.GAVE.HNE. ML:1.5 0.00013293537999999999 0.3296 AML other m 2020-12-27T03:00:24.53
IV.GAVE.EHE. ML:1.3 0.000088807645 0.1808 AML other m 2020-12-27T03:00:24.54
IV.TERO.HHE. ML:1.0 0.000060692055 0.0592 AML other m 2020-12-27T03:00:24.64
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