Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-12-2019 and time 22:56:54 (Italy) in region 8 km SE Cascia (PG)

A magnitude ML 1.6 earthquake occured in region: 8 km SE Cascia (PG), on

  • 28-12-2019 21:56:54 (UTC)
  • 28-12-2019 22:56:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6740, 13.0840 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.

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
Cascia PG 8 3217 3217
Cittareale RI 9 482 3699
Monteleone di Spoleto PG 11 599 4298
Poggiodomo PG 13 117 4415
Norcia PG 13 4957 9372
Accumoli RI 14 667 10039
Leonessa RI 16 2435 12474
Posta RI 17 694 13168
Amatrice RI 18 2657 15825
Borbona RI 18 617 16442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Terni (111501 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
44 Km SE of Foligno (57155 inhabitants)
51 Km W of Teramo (54892 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km N of Tivoli (56533 inhabitants)
85 Km E of Viterbo (67173 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 inhabitants)
100 Km NE of Roma (2864731 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 1.6 2019-12-28
21:56:54		 42.6738 13.0837 11 2020-02-28
16:42:22		 Bollettino Sismico Italiano INGV 76165011
Reviewed
Rev100 		ML 1.9 2019-12-28
21:56:53		 42.6643 13.0847 13 2019-12-28
22:01:51		 Sala Sismica INGV-Roma 75059491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-28 21:56:54 ± 0.08
Latitude 42.6738 ± 0.0045
Longitude 13.0837 ± 0.0073
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 76165011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 566
Semi-minor axis of confidence ellipse (meter) 429
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 238
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) 74
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 22
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) 0.42718
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 76165011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-03 13:41:51

ML:1.9

Field Value
Value 1.9
Uncertainty 0.7
Num. used stations 10
Type of magnitude ML
Reference to an origin 75059491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-28 22:01:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2019-12-28T21:58:46.06 3.0 undecidable manual Sg 6.03 0
IV.MNTV.HNZ. 2019-12-28T21:58:20.98 3.0 undecidable manual Sn -0.11 0
IV.CGL.BHZ. 2019-12-28T21:58:11.76 3.0 undecidable manual Pg 8.58 0
SL.KOGS.BHZ. 2019-12-28T21:57:58.12 3.0 undecidable manual Pn -3.91 0
OX.AGOR.HNZ. 2019-12-28T21:57:47.87 3.0 undecidable manual Pn -4.74 0
IV.PTRJ.HNZ. 2019-12-28T21:57:47.32 3.0 undecidable manual Sg -2.23 0
IX.STN3.HHZ.02 2019-12-28T21:57:44.66 3.0 negative manual Pg 2.9 0
IV.VITU.HNZ. 2019-12-28T21:57:31.36 3.0 undecidable manual Pg 3.21 0
IV.INTR.HHZ. 2019-12-28T21:57:24.79 3.0 undecidable manual S -3.25 0
IT.VNF1.HGZ. 2019-12-28T21:57:21.61 3.0 negative manual Pn 0.1 0
IV.MF5.EHN. 2019-12-28T21:57:10.42 0.3 undecidable manual S 41 46.3203 50 1.47 41
IV.CSP1.EHZ. 2019-12-28T21:57:09.41 0.1 undecidable manual S 12 47.4192 50 0.18 91
IV.INTR.HHZ. 2019-12-28T21:57:08.85 3.0 undecidable manual P -4.6 0
IV.FDMO.HHZ. 2019-12-28T21:57:07.36 0.3 undecidable manual S 0 40.2264 50 0.04 71
IV.CESI.HHZ. 2019-12-28T21:57:07.30 0.3 undecidable manual S 338 39.5271 50 0.17 70
IV.MMO1.EHZ. 2019-12-28T21:57:04.85 0.1 undecidable manual S 38 31.8459 50 -0.24 93
IV.MF5.EHN. 2019-12-28T21:57:03.00 0.1 undecidable manual P 41 46.3203 50 0.35 88
IV.CSP1.EHZ. 2019-12-28T21:57:02.61 0.1 negative manual P 12 47.4192 50 -0.2 91
IV.SMA1.EHN. 2019-12-28T21:57:02.38 0.3 undecidable manual S 103 21.0678 50 0.18 72
IV.CESI.HHZ. 2019-12-28T21:57:01.46 0.1 undecidable manual P 338 39.5271 50 -0.13 94
IV.T1299.HNN. 2019-12-28T21:57:01.03 0.1 undecidable manual S 105 16.7721 123 0.09 98
IV.FDMO.HHZ. 2019-12-28T21:57:01.52 0.1 negative manual P 0 40.2264 50 -0.18 93
IV.RM33.EHZ. 2019-12-28T21:57:01.96 0.1 undecidable manual S 150 21.1677 50 -0.27 94
IV.NRCA.HHZ. 2019-12-28T21:57:00.96 0.1 undecidable manual S 8 17.871 121 -0.31 94
IV.MMO1.EHZ. 2019-12-28T21:57:00.14 0.1 positive manual P 38 31.8459 50 -0.28 92
IV.GAVE.EHZ. 2019-12-28T21:57:00.67 0.1 undecidable manual S 278 15.5733 124 0.07 99
IV.LNSS.HHZ. 2019-12-28T21:56:59.00 0.1 undecidable manual S 204 8.6802 141 0.19 98
IV.RM33.EHZ. 2019-12-28T21:56:58.51 0.1 positive manual P 150 21.1677 50 -0.26 94
IV.NRCA.HHZ. 2019-12-28T21:56:58.01 0.1 undecidable manual P 8 17.871 121 -0.21 96
IV.SMA1.EHN. 2019-12-28T21:56:58.75 0.1 undecidable manual P 103 21.0678 50 0 99
IV.T1299.HNN. 2019-12-28T21:56:58.02 0.1 negative manual P 105 16.7721 123 0 100
IV.GAVE.EHZ. 2019-12-28T21:56:57.92 0.1 undecidable manual P 278 15.5733 124 0.09 98
IV.LNSS.HHZ. 2019-12-28T21:56:56.94 0.1 positive manual P 204 8.6802 141 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HNN. ML:1.6 0.000561 0.14 AML other m 2019-12-28T21:56:59.32
IV.LNSS.HHE. ML:1.9 0.0009825 0.44 AML other m 2019-12-28T21:56:59.26
IV.LNSS.HNE. ML:1.9 0.00099 0.46 AML other m 2019-12-28T21:56:59.26
IV.LNSS.HHN. ML:1.6 0.000583 0.36 AML other m 2019-12-28T21:56:59.32
IV.GAVE.EHE. ML:1.4 0.00021750000000000003 1.86 AML other m 2019-12-28T21:57:00.99
IV.GAVE.EHN. ML:1.3 0.0001825 1.44 AML other m 2019-12-28T21:57:01.13
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