INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 16-02-2019 and time 20:44:46 (Italy) in region 2 km E Sant'Anatolia di Narco (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km E Sant'Anatolia di Narco (PG), on

  • 16-02-2019 19:44:46 (UTC)
  • 16-02-2019 20:44:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.73, 12.87 at 12 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sant'Anatolia di Narco PG 3 564 564
Scheggino PG 3 461 1025
Vallo di Nera PG 5 364 1389
Poggiodomo PG 6 117 1506
Spoleto PG 10 38218 39724
Cerreto di Spoleto PG 11 1075 40799
Monteleone di Spoleto PG 11 599 41398
Cascia PG 12 3217 44615
Campello sul Clitunno PG 13 2442 47057
Ferentillo TR 14 1913 48970
Polino TR 16 233 49203
Montefranco TR 17 1276 50479
Arrone TR 18 2763 53242
Sellano PG 19 1079 54321
Castel Ritaldi PG 19 3278 57599
Trevi PG 19 8469 66068
Norcia PG 20 4957 71025

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NE of Terni (111501 inhabitants)
29 Km SE of Foligno (57155 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
69 Km W of Teramo (54892 inhabitants)
71 Km E of Viterbo (67173 inhabitants)
82 Km N of Guidonia Montecelio (88673 inhabitants)
85 Km N of Tivoli (56533 inhabitants)
98 Km NE of Roma (2864731 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.1 2019-02-16
19:44:46
42.73 12.87 12 2019-02-16
19:51:41
Sala Sismica INGV-Roma 65610941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-16 19:44:46 ± 0.06
Latitude 42.73 ± 0.00
Longitude 12.87 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 65610941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 41
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34804
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 65610941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-16 19:51:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.VNF1.HGZ. 2019-02-16T19:45:31.91 3.0 undecidable manual S -0.04 0
IV.PE3.EHZ. 2019-02-16T19:45:02.85 3.0 positive manual P -1.75 0
IV.MTCE.HHZ. 2019-02-16T19:45:02.61 3.0 undecidable manual P 2.71 0
IV.ASSB.HHZ. 2019-02-16T19:44:58.66 0.3 undecidable manual S 334 0.348 93 -0.15 71
IV.FDMO.HHZ. 2019-02-16T19:44:58.89 0.3 undecidable manual S 28 0.3471 93 0.12 70
IV.CESI.HHZ. 2019-02-16T19:44:56.71 0.1 undecidable manual S 6 0.277 94 0.01 96
IV.CSP1.EHZ. 2019-02-16T19:44:55.33 3.0 positive manual P 0.2 0
IV.MOMA.HHE. 2019-02-16T19:44:55.46 0.1 undecidable manual S 289 0.2293 95 0.16 94
IV.CESX.HHE. 2019-02-16T19:44:54.90 0.3 undecidable manual S 240 0.2383 95 -0.65 62
IV.NRCA.HHZ. 2019-02-16T19:44:54.40 0.3 undecidable manual S 60 0.2095 96 -0.31 69
IV.ARRO.EHE. 2019-02-16T19:44:53.55 0.6 undecidable manual S 206 0.1673 101 0.09 50
IV.LNSS.HHZ. 2019-02-16T19:44:53.91 0.1 undecidable manual S 135 0.1799 99 0.08 98
IV.ASSB.HHZ. 2019-02-16T19:44:53.40 0.1 undecidable manual P 334 0.348 93 0 96
IV.FDMO.HHZ. 2019-02-16T19:44:53.40 0.1 undecidable manual P 28 0.3471 93 0.01 96
IV.CESI.HHZ. 2019-02-16T19:44:52.22 0.1 undecidable manual P 6 0.277 94 0.03 96
IV.NRCA.HHZ. 2019-02-16T19:44:51.02 0.3 undecidable manual P 60 0.2095 96 -0.02 74
IV.MOMA.HHE. 2019-02-16T19:44:51.49 0.1 undecidable manual P 289 0.2293 95 0.11 96
IV.GAVE.EHZ. 2019-02-16T19:44:50.31 0.1 undecidable manual S 151 0.0423 153 -0.15 97
IV.ARRO.EHE. 2019-02-16T19:44:50.53 0.1 undecidable manual P 206 0.1673 101 0.21 96
IV.LNSS.HHZ. 2019-02-16T19:44:50.69 0.1 undecidable manual P 135 0.1799 99 0.16 98
IV.CESX.HHE. 2019-02-16T19:44:50.94 1.0 undecidable manual P 240 0.2383 95 -0.58 21
IV.GAVE.EHZ. 2019-02-16T19:44:48.73 0.1 undecidable manual P 151 0.0423 153 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.5 0.000427 0.16 AML other m 2019-02-16T19:44:50.69
IV.GAVE.EHN. ML:1.7 0.000717 0.32 AML other m 2019-02-16T19:44:50.77
IV.NRCA.HHE. ML:1.1 6.785E-5 0.12 AML other m 2019-02-16T19:44:54.67
IV.LNSS.HHN. ML:1 7.325E-5 0.12 AML other m 2019-02-16T19:44:54.73
IV.LNSS.HHE. ML:1 7.615E-5 1.14 AML other m 2019-02-16T19:44:54.86
IV.NRCA.HHN. ML:0.9 5.13E-5 0.7 AML other m 2019-02-16T19:44:55.47
IV.CESI.HHE. ML:0.9 4.135E-5 0.14 AML other m 2019-02-16T19:44:57.12
IV.CESI.HHN. ML:1 4.635E-5 0.74 AML other m 2019-02-16T19:44:57.18
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download