Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 19-12-2020 and time 18:59:05 (Italy) in region 4 km SE Scanno (AQ)

A magnitude ML 1.0 earthquake occured in region: 4 km SE Scanno (AQ), on

  • 19-12-2020 17:59:05 (UTC)
  • 19-12-2020 18:59:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8820, 13.9270 at 22 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
Scanno AQ 4 1847 1847
Rocca Pia AQ 7 178 2025
Villalago AQ 10 568 2593
Pettorano sul Gizio AQ 11 1376 3969
Pescocostanzo AQ 12 1128 5097
Villetta Barrea AQ 12 653 5750
Rivisondoli AQ 12 700 6450
Civitella Alfedena AQ 13 296 6746
Roccaraso AQ 13 1627 8373
Opi AQ 14 420 8793
Pescasseroli AQ 14 2203 10996
Introdacqua AQ 14 2126 13122
Bisegna AQ 15 223 13345
Barrea AQ 15 726 14071
Cansano AQ 15 274 14345
Anversa degli Abruzzi AQ 16 341 14686
Bugnara AQ 17 1125 15811
Campo di Giove AQ 18 803 16614
Scontrone AQ 18 574 17188
Castel di Sangro AQ 19 6538 23726
Sulmona AQ 19 24557 48283
Alfedena AQ 19 864 49147
Pacentro AQ 20 1174 50321

Municipalities with at least 50000 inhabitants

An earthquake occurred to
56 Km SW of Chieti (51815 inhabitants)
68 Km SE of L'Aquila (69753 inhabitants)
69 Km SW of Pescara (121014 inhabitants)
73 Km S of Montesilvano (53738 inhabitants)
88 Km S of Teramo (54892 inhabitants)
94 Km E of Tivoli (56533 inhabitants)
96 Km NW of Caserta (76326 inhabitants)
97 Km E of Latina (125985 inhabitants)
98 Km E of Velletri (53303 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 1.0 2020-12-19
17:59:05		 41.8818 13.9273 22 2021-02-26
14:56:15		 Bollettino Sismico Italiano INGV 86225701
Reviewed
Rev100 		ML 1.0 2020-12-19
17:59:05		 41.8853 13.924 21 2020-12-19
18:05:36		 Sala Sismica INGV-Roma 85552011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-19 17:59:05 ± 0.1
Latitude 41.8818 ± 0.0036
Longitude 13.9273 ± 0.0048
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86225701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 423
Semi-minor axis of confidence ellipse (meter) 151
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.12770
Epicentral distance of station farthest from the epicenter (degree) 0.36512
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:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85552011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-19 18:05:36

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86225701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-13 14:34:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T0110.HHZ. 2020-12-19T17:59:19.35 0.3 undecidable manual S 342 40.5261 110 0.21 71
IV.MIDA.HNZ. 2020-12-19T17:59:18.49 0.6 undecidable manual S 134 37.9287 112 -0.01 48
IV.CERA.HHZ. 2020-12-19T17:59:17.33 0.3 undecidable manual S 167 32.4453 116 0.18 70
IV.RNI2.HNZ. 2020-12-19T17:59:16.16 0.3 undecidable manual S 137 27.1506 121 0.24 70
IV.POFI.HNZ. 2020-12-19T17:59:15.20 0.3 undecidable manual S 224 25.4523 123 -0.34 70
IV.LPEL.HHZ. 2020-12-19T17:59:15.75 0.3 undecidable manual S 49 27.9498 120 -0.34 70
IT.SULP.HGZ. 2020-12-19T17:59:15.00 0.6 undecidable manual S 0 22.5552 127 0.11 49
IV.VVLD.HHZ. 2020-12-19T17:59:15.38 0.3 undecidable manual S 267 25.1526 124 -0.09 73
IT.SULA.HNZ. 2020-12-19T17:59:14.88 0.3 undecidable manual S 358 21.2676 129 0.25 72
IT.OPI.HGZ. 2020-12-19T17:59:13.03 0.3 undecidable manual S 214 14.1747 142 -0.27 73
IV.T0110.HHZ. 2020-12-19T17:59:13.41 0.3 undecidable manual P 342 40.5261 110 0.09 72
IV.INTR.HHZ. 2020-12-19T17:59:13.30 0.3 undecidable manual S 353 14.4744 141 -0.05 75
IV.CERA.HHZ. 2020-12-19T17:59:12.13 0.1 undecidable manual P 167 32.4453 116 -0.04 98
IV.MIDA.HNZ. 2020-12-19T17:59:12.67 0.1 undecidable manual P 134 37.9287 112 -0.28 93
IV.RNI2.HNZ. 2020-12-19T17:59:11.73 0.3 undecidable manual P 137 27.1506 121 0.27 70
IV.VVLD.HHZ. 2020-12-19T17:59:11.32 0.1 undecidable manual P 267 25.1526 124 0.12 98
IV.POFI.HNZ. 2020-12-19T17:59:11.28 0.1 undecidable manual P 224 25.4523 123 0.04 99
IV.LPEL.HHZ. 2020-12-19T17:59:11.41 0.3 undecidable manual P 49 27.9498 120 -0.15 72
IV.INTR.HHZ. 2020-12-19T17:59:10.11 0.1 undecidable manual P 353 14.4744 141 0.14 99
IT.SULA.HNZ. 2020-12-19T17:59:10.89 0.6 undecidable manual P 358 21.2676 129 0.18 49
IT.OPI.HGZ. 2020-12-19T17:59:10.02 0.1 undecidable manual P 214 14.1747 142 0.07 100
IT.SULP.HGZ. 2020-12-19T17:59:10.50 0.3 undecidable manual P 0 22.5552 127 -0.37 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.INTR.HHE. ML:1.1 0.000078310065 0.1024 AML other m 2020-12-19T17:59:13.78
IV.INTR.HNN. ML:1.3 0.00012886075999999998 0.0896 AML other m 2020-12-19T17:59:13.80
IV.INTR.HHN. ML:1.3 0.00012618480000000003 0.0896 AML other m 2020-12-19T17:59:13.80
IV.INTR.HNE. ML:1.1 0.00008468855 0.2048 AML other m 2020-12-19T17:59:14.80
IV.VVLD.HHN. ML:1.0 0.000047748400000000005 0.1664 AML other m 2020-12-19T17:59:15.68
IV.VVLD.HHE. ML:0.8 0.00003127824 0.1536 AML other m 2020-12-19T17:59:15.69
IV.CERA.HHE. ML:0.8 0.00002401311 0.2816 AML other m 2020-12-19T17:59:18.19
IV.CERA.HHN. ML:0.8 0.000026036995 0.192 AML other m 2020-12-19T17:59:18.78
IV.T0110.HHE. ML:0.9 0.000023253541500000004 0.256 AML other m 2020-12-19T17:59:21.15
IV.T0110.HHN. ML:0.8 0.0000200358 0.32 AML other m 2020-12-19T17:59:21.61
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