Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 17-12-2020 and time 21:28:56 (UTC) in region 3 km NE Cascia (PG)

A magnitude ML 1.3 earthquake occured in region: 3 km NE Cascia (PG), on

  • 17-12-2020 21:28:56 (UTC)
  • 17-12-2020 22:28:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7370, 13.0340 at 10 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.

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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
Cascia PG 3 3217 3217
Norcia PG 8 4957 8174
Poggiodomo PG 8 117 8291
Monteleone di Spoleto PG 12 599 8890
Cerreto di Spoleto PG 13 1075 9965
Vallo di Nera PG 14 364 10329
Preci PG 16 724 11053
Sant'Anatolia di Narco PG 16 564 11617
Cittareale RI 17 482 12099
Scheggino PG 17 461 12560
Accumoli RI 18 667 13227
Sellano PG 19 1079 14306

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
37 Km NE of Terni (111501 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
56 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
84 Km E of Viterbo (67173 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km N of Tivoli (56533 inhabitants)
95 Km W of Montesilvano (53738 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 1.3 2020-12-17
21:28:56		 42.7367 13.0337 10 2020-12-17
21:34:05		 Sala Sismica INGV-Roma 85502321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-17 21:28:56 ± 0.07
Latitude 42.7367 ± 0.0045
Longitude 13.0337 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85502321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 333
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 32
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52430
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 85502321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-17 21:34:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-12-17T21:29:23.25 3.0 undecidable manual S -0.06 0
IV.MNTT.EHZ. 2020-12-17T21:29:15.46 0.6 undecidable manual S 51 58.1973 50 0.92 35
IV.FIAM.HHZ. 2020-12-17T21:29:12.80 3.0 undecidable manual S -1.13 0
IV.MF5.EHZ. 2020-12-17T21:29:11.85 0.3 undecidable manual S 51 44.4222 50 0.99 53
IV.ASSB.HHZ. 2020-12-17T21:29:11.00 0.6 undecidable manual S 318 45.621 50 -0.18 46
IV.TERO.HHZ. 2020-12-17T21:29:11.53 0.6 undecidable manual S 105 48.2184 50 -0.33 44
IV.CSP1.EHZ. 2020-12-17T21:29:10.28 0.3 undecidable manual S 19 41.8248 50 0.13 70
IV.MOMA.HHZ. 2020-12-17T21:29:09.42 0.6 undecidable manual S 281 38.4282 50 0.15 47
IV.CAMP.HHZ. 2020-12-17T21:29:08.49 0.6 undecidable manual S 126 37.8288 50 -0.62 41
IV.FDMO.HHZ. 2020-12-17T21:29:07.43 0.6 undecidable manual S 7 33.5442 50 -0.52 43
IV.CESI.HHZ. 2020-12-17T21:29:07.14 0.3 undecidable manual S 341 31.5462 50 -0.28 69
IV.MNTT.EHZ. 2020-12-17T21:29:07.73 0.1 undecidable manual P 51 58.1973 50 0.88 72
IV.ARRO.EHZ. 2020-12-17T21:29:06.09 0.6 undecidable manual S 231 27.9498 50 -0.38 45
IV.SMA1.EHZ. 2020-12-17T21:29:06.17 0.6 undecidable manual S 115 27.2505 50 -0.11 48
IV.MMO1.EHZ. 2020-12-17T21:29:06.47 0.6 undecidable manual S 53 29.9478 50 -0.52 44
IV.MF5.EHZ. 2020-12-17T21:29:05.02 0.6 negative manual P 51 44.4222 50 0.3 45
IV.TERO.HHZ. 2020-12-17T21:29:05.12 0.6 undecidable manual P 105 48.2184 50 -0.18 46
IV.CSP1.EHZ. 2020-12-17T21:29:04.12 1.0 undecidable manual P 19 41.8248 50 -0.2 23
IV.ASSB.HHZ. 2020-12-17T21:29:04.91 0.6 negative manual P 318 45.621 50 0 48
IV.GUMA.HHZ. 2020-12-17T21:29:04.93 3.0 undecidable manual P 0.34 0
IV.MC2.EHZ. 2020-12-17T21:29:04.92 0.6 undecidable manual S 33 23.1546 114 -0.18 48
IV.MOMA.HHZ. 2020-12-17T21:29:03.90 0.6 positive manual P 281 38.4282 50 0.09 47
IV.CAMP.HHZ. 2020-12-17T21:29:03.51 1.0 undecidable manual P 126 37.8288 50 -0.2 23
IV.MMO1.EHZ. 2020-12-17T21:29:02.12 1.0 positive manual P 53 29.9478 50 -0.37 23
IV.CESI.HHZ. 2020-12-17T21:29:02.68 1.0 negative manual P 341 31.5462 50 -0.06 24
IV.GAVE.EHZ. 2020-12-17T21:29:02.05 0.1 undecidable manual S 247 12.3765 129 0.15 98
IV.FDMO.HHZ. 2020-12-17T21:29:02.71 1.0 positive manual P 7 33.5442 50 -0.33 23
IV.ARRO.EHZ. 2020-12-17T21:29:02.04 0.3 undecidable manual P 231 27.9498 50 -0.15 71
IV.LNSS.HHZ. 2020-12-17T21:29:02.50 0.3 undecidable manual S 178 14.874 124 -0.08 74
IV.SMA1.EHZ. 2020-12-17T21:29:02.11 0.6 positive manual P 115 27.2505 50 0.03 49
IV.NRCA.HHZ. 2020-12-17T21:29:01.58 0.1 undecidable manual S 31 12.5763 129 -0.37 93
IV.MC2.EHZ. 2020-12-17T21:29:01.29 0.6 negative manual P 33 23.1546 114 -0.11 48
IV.LNSS.HHZ. 2020-12-17T21:29:00.10 0.1 positive manual P 178 14.874 124 0.16 97
IV.NRCA.HHZ. 2020-12-17T21:28:59.53 0.1 negative manual P 31 12.5763 129 -0.04 100
IV.GAVE.EHZ. 2020-12-17T21:28:59.77 0.1 positive manual P 247 12.3765 129 0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.8 0.0006855 0.1 AML other m 2020-12-17T21:29:01.74
IV.NRCA.HNN. ML:1.8 0.0006515 0.1 AML other m 2020-12-17T21:29:01.69
IV.NRCA.HHE. ML:2.0 0.0010685 0.16 AML other m 2020-12-17T21:29:01.83
IV.NRCA.HNE. ML:2.0 0.001053 0.16 AML other m 2020-12-17T21:29:01.84
IV.GAVE.EHE. ML:1.9 0.0008160000000000001 0.24 AML other m 2020-12-17T21:29:02.65
IV.GAVE.EHN. ML:1.9 0.0008349999999999999 0.18 AML other m 2020-12-17T21:29:02.67
IV.LNSS.HHE. ML:1.6 0.0003615 0.12 AML other m 2020-12-17T21:29:02.93
IV.LNSS.HHN. ML:1.6 0.000391 0.84 AML other m 2020-12-17T21:29:03.53
IV.SMA1.EHE. ML:1.4 0.0001305 0.56 AML other m 2020-12-17T21:29:06.63
IV.ARRO.EHN. ML:1.1 0.00006379999999999999 0.62 AML other m 2020-12-17T21:29:07.59
IV.CESI.HHE. ML:1.0 0.00004635 0.66 AML other m 2020-12-17T21:29:07.53
IV.CESI.HHN. ML:1.2 0.0000748 0.64 AML other m 2020-12-17T21:29:07.44
IV.FDMO.HHE. ML:1.0 0.00004035 0.22 AML other m 2020-12-17T21:29:07.83
IV.SMA1.EHN. ML:1.2 0.0000738 0.5 AML other m 2020-12-17T21:29:09.03
IV.FDMO.HHN. ML:1.0 0.000038 1.4 AML other m 2020-12-17T21:29:09.81
IV.CAMP.HHE. ML:0.7 0.000020799999999999997 1.28 AML other m 2020-12-17T21:29:09.29
IV.ARRO.EHE. ML:1.0 0.00005595 0.24 AML other m 2020-12-17T21:29:09.60
IV.CAMP.HHN. ML:0.7 0.000017500000000000002 1.72 AML other m 2020-12-17T21:29:09.06
IV.MOMA.HHE. ML:1.5 0.00010965 1.76 AML other m 2020-12-17T21:29:10.95
IV.MOMA.HHN. ML:1.1 0.000051699999999999996 0.22 AML other m 2020-12-17T21:29:10.27
IV.CSP1.EHE. ML:1.5 0.0000945 0.76 AML other m 2020-12-17T21:29:11.50
IV.GUMA.HHN. ML:1.4 0.00007205 1.36 AML other m 2020-12-17T21:29:11.74
IV.CSP1.EHN. ML:1.4 0.00009025 0.34 AML other m 2020-12-17T21:29:11.84
IV.ASSB.HHE. ML:1.2 0.0000435 1.06 AML other m 2020-12-17T21:29:12.37
IV.ASSB.HHN. ML:1.2 0.000051699999999999996 0.48 AML other m 2020-12-17T21:29:12.61
IV.TERO.HHN. ML:1.2 0.00004545000000000001 0.52 AML other m 2020-12-17T21:29:12.70
IV.TERO.HHE. ML:1.0 0.000032099999999999994 0.14 AML other m 2020-12-17T21:29:13.55
IV.GUMA.HHE. ML:1.4 0.0000713 0.42 AML other m 2020-12-17T21:29:14.47
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