Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 07-12-2020 and time 01:32:54 (Italy) in region 4 km S Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 4 km S Amatrice (RI), on

  • 07-12-2020 00:32:54 (UTC)
  • 07-12-2020 01:32:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5950, 13.2750 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 4 2657 2657
Montereale AQ 8 2581 5238
Capitignano AQ 9 665 5903
Campotosto AQ 9 542 6445
Cittareale RI 10 482 6927
Accumoli RI 11 667 7594
Borbona RI 15 617 8211
Cagnano Amiterno AQ 16 1369 9580
Barete AQ 16 737 10317
Posta RI 17 694 11011
Crognaleto TE 18 1297 12308
Pizzoli AQ 18 4326 16634
Cortino TE 19 656 17290
Arquata del Tronto AP 20 1178 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
52 Km E of Terni (111501 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Chieti (51815 inhabitants)
78 Km W of Pescara (121014 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
80 Km NE of Tivoli (56533 inhabitants)
92 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 1.4 2020-12-07
00:32:54		 42.5952 13.2748 11 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86093051
Reviewed
Rev100 		ML 1.6 2020-12-07
00:32:54		 42.6015 13.2765 11 2020-12-07
00:38:44		 Sala Sismica INGV-Roma 85255431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-07 00:32:54 ± 0.08
Latitude 42.5952 ± 0.0063
Longitude 13.2748 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86093051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 671
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 198
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.41549
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 85255431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-07 00:38:44

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 86093051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-08 09:16:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARRO.EHZ. 2020-12-07T00:33:07.96 0.6 undecidable manual S 268 41.625 90 -0.2 46
IV.MC2.EHZ. 2020-12-07T00:33:06.87 0.6 undecidable manual S 349 35.742 91 0.27 46
IV.GIGS.HJZ. 2020-12-07T00:33:04.74 0.3 undecidable manual S 123 29.0487 91 -0.06 73
IV.NRCA.HHZ. 2020-12-07T00:33:04.59 0.3 undecidable manual S 334 29.4483 91 -0.34 69
IV.TERO.HHZ. 2020-12-07T00:33:03.92 0.3 undecidable manual S 83 27.0507 91 -0.35 69
IV.MF5.EHZ. 2020-12-07T00:33:03.67 0.3 undecidable manual P 19 46.1205 90 0.56 63
IV.LNSS.HHZ. 2020-12-07T00:33:02.14 0.3 undecidable manual S 273 19.1697 92 -0.03 74
IV.MTRA.EHZ. 2020-12-07T00:33:02.16 0.3 undecidable manual S 29 20.4684 92 -0.36 70
IV.ARRO.EHZ. 2020-12-07T00:33:02.46 0.3 undecidable manual P 268 41.625 90 0.03 72
IV.MC2.EHZ. 2020-12-07T00:33:01.27 0.6 undecidable manual P 349 35.742 91 -0.26 46
IV.NRCA.HHZ. 2020-12-07T00:33:00.50 0.1 undecidable manual P 334 29.4483 91 -0.06 97
IV.CAMP.HHZ. 2020-12-07T00:33:00.55 0.3 undecidable manual S 121 12.7761 107 0.07 75
IV.GIGS.HJZ. 2020-12-07T00:33:00.31 0.3 undecidable manual P 123 29.0487 91 -0.18 71
IV.TERO.HHZ. 2020-12-07T00:33:00.22 0.1 undecidable manual P 83 27.0507 91 0.04 98
IV.LNSS.HHZ. 2020-12-07T00:32:59.10 0.1 positive manual P 273 19.1697 92 0.13 98
IV.MTRA.EHZ. 2020-12-07T00:32:59.17 0.1 undecidable manual P 29 20.4684 92 0 99
IV.SMA1.EHZ. 2020-12-07T00:32:59.06 0.3 undecidable manual S 52 6.2937 141 0 77
IV.CAMP.HHZ. 2020-12-07T00:32:58.25 0.3 undecidable manual P 121 12.7761 107 0.25 72
IV.T1299.EHZ. 2020-12-07T00:32:58.51 0.3 undecidable manual S 8 4.3956 152 -0.27 73
IV.T1299.EHZ. 2020-12-07T00:32:57.15 0.1 negative manual P 8 4.3956 152 0.14 100
IV.SMA1.EHZ. 2020-12-07T00:32:57.49 0.1 undecidable manual P 52 6.2937 141 0.31 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.6 0.0005772132 0.24 AML other m 2020-12-07T00:32:59.82
IV.SMA1.EHE. ML:2.1 0.0018269310000000002 0.44 AML other m 2020-12-07T00:32:59.43
IV.MTRA.EHN. ML:1.5 0.00021977949999999998 0.14 AML other m 2020-12-07T00:33:02.42
IV.MTRA.EHE. ML:1.5 0.0002082052 0.14 AML other m 2020-12-07T00:33:02.62
IV.LNSS.HHE. ML:1.3 0.00013815738 0.2 AML other m 2020-12-07T00:33:02.16
IV.LNSS.HHN. ML:1.3 0.0001515 0.22 AML other m 2020-12-07T00:33:03.27
IV.LNSS.HNE. ML:1.3 0.000141549625 0.23 AML other m 2020-12-07T00:33:02.15
IV.LNSS.HNN. ML:1.3 0.00013990295 0.24 AML other m 2020-12-07T00:33:03.27
IV.MTRA.HNN. ML:1.5 0.0002364794 0.14 AML other m 2020-12-07T00:33:02.41
IV.MTRA.HNE. ML:1.5 0.000212543915 0.15 AML other m 2020-12-07T00:33:02.62
IV.TERO.HNN. ML:1.7 0.00025244675 1.37 AML other m 2020-12-07T00:33:06.48
IV.TERO.HNE. ML:1.2 0.00009000094765 0.6 AML other m 2020-12-07T00:33:04.22
IV.TERO.HHE. ML:1.1 0.00006556054 0.16 AML other m 2020-12-07T00:33:04.21
IV.TERO.HHN. ML:1.2 0.000092046965 1.24 AML other m 2020-12-07T00:33:05.65
IV.NRCA.HHE. ML:1.5 0.0001405355 0.08 AML other m 2020-12-07T00:33:05.27
IV.NRCA.HHN. ML:1.3 0.000095895315 0.08 AML other m 2020-12-07T00:33:04.78
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