Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 21-12-2016 and time 12:39:40 (Italy) in region 3 km NE Cerreto di Spoleto (PG)

A magnitude ML 1.4 earthquake occured in region: 3 km NE Cerreto di Spoleto (PG), on

  • 21-12-2016 11:39:40 (UTC)
  • 21-12-2016 12:39:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8400, 12.9450 at 1 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
Cerreto di Spoleto PG 3 1075 1075
Sellano PG 6 1079 2154
Preci PG 9 724 2878
Vallo di Nera PG 10 364 3242
Norcia PG 13 4957 8199
Campello sul Clitunno PG 14 2442 10641
Poggiodomo PG 14 117 10758
Cascia PG 15 3217 13975
Sant'Anatolia di Narco PG 15 564 14539
Visso MC 16 1107 15646
Trevi PG 17 8469 24115
Scheggino PG 17 461 24576
Monte Cavallo MC 18 145 24721
Castelsantangelo sul Nera MC 18 281 25002
Ussita MC 20 444 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
54 Km SE of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 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 1.4 2016-12-21
11:39:40		 42.8397 12.9448 1 2016-12-21
11:52:28		 Sala Sismica INGV-Roma 37333231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-21 11:39:40 ± 0.19
Latitude 42.8397 ± 0.0090
Longitude 12.9448 ± 0.0123
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 37333231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1230
Semi-minor axis of confidence ellipse (meter) 730
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 138
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31566
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 37333231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-21 11:52:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SBPO.HNZ. 2016-12-21T11:40:56.38 3.0 undecidable manual Sn 0.32 0
IV.CAVE.HHZ. 2016-12-21T11:40:21.33 3.0 undecidable manual Pn 2.38 0
IV.VVLD.HHZ. 2016-12-21T11:40:14.52 3.0 undecidable manual S -2.27 0
IV.PTRJ.HHZ. 2016-12-21T11:40:11.27 3.0 negative manual Pn 0.21 0
IV.CAFI.HHZ. 2016-12-21T11:40:07.57 3.0 undecidable manual S -0.98 0
IV.CSP1.EHZ. 2016-12-21T11:39:51.58 0.1 undecidable manual S 37 35.0427 91 -0.72 79
IV.FDMO.HHZ. 2016-12-21T11:39:49.29 0.1 undecidable manual S 28 24.753 91 0.58 86
IV.T1218.EHZ. 2016-12-21T11:39:48.91 0.3 undecidable manual S 144 23.3544 91 0.65 62
IV.CSP1.EHZ. 2016-12-21T11:39:47.37 0.1 undecidable manual P 37 35.0427 91 0.21 92
IV.MC2.EHZ. 2016-12-21T11:39:47.21 0.1 undecidable manual S 68 21.3675 92 -0.35 92
IV.T1245.HHZ. 2016-12-21T11:39:46.67 0.1 undecidable manual S 85 19.869 92 -0.36 92
IV.FDMO.HHZ. 2016-12-21T11:39:45.72 0.6 undecidable manual P 28 24.753 91 0.63 42
IV.MMO1.EHZ. 2016-12-21T11:39:45.90 0.1 undecidable manual P 78 31.746 91 -0.6 84
IV.T1245.HHZ. 2016-12-21T11:39:44.63 0.1 undecidable manual P 85 19.869 92 0.51 89
IV.T1218.EHZ. 2016-12-21T11:39:44.64 0.1 undecidable manual P 144 23.3544 91 -0.18 95
IV.MC2.EHZ. 2016-12-21T11:39:44.95 0.1 undecidable manual P 68 21.3675 92 0.53 88
IV.T1215.EHZ. 2016-12-21T11:39:42.70 0.1 undecidable manual S 236 7.4814 94 -0.05 100
IV.T1215.EHZ. 2016-12-21T11:39:41.29 0.1 undecidable manual P 236 7.4814 94 -0.35 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1215.HNE. ML:0.0 0.000092762625 1.4528 AML other m 2016-12-21T11:39:42.27
IV.T1215.HNN. ML:0.0 0.00006211017499999999 1.5552 AML other m 2016-12-21T11:39:43.59
IV.T1245.HNE. ML:1.5 0.000251942 1.2288 AML other m 2016-12-21T11:39:46.71
IV.T1245.HHN. ML:1.3 0.0001687034 0.8192 AML other m 2016-12-21T11:39:46.81
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