INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.6 on date 20-02-2019 and time 10:26:25 (Italy) in region 2 km NE Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 2 km NE Norcia (PG), on

  • 20-02-2019 09:26:25 (UTC)
  • 20-02-2019 10:26:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.11 at 11 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
Norcia PG 2 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Arquata del Tronto AP 16 1178 11464
Cerreto di Spoleto PG 16 1075 12539
Ussita MC 16 444 12983
Accumoli RI 17 667 13650
Poggiodomo PG 17 117 13767
Sellano PG 18 1079 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 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 1.6 2019-02-20
09:26:25
42.8 13.11 11 2019-02-20
09:37:35
Sala Sismica INGV-Roma 65727771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-20 09:26:25 ± 0.04
Latitude 42.80 ± 0.00
Longitude 13.11 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 65727771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 323
Semi-minor axis of confidence ellipse (meter) 246
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.5261
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 65727771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-20 09:37:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VBKN.HHZ. 2019-02-20T09:26:53.26 3.0 undecidable manual Sg 2.14 0
IV.GUMA.HHZ. 2019-02-20T09:26:37.32 0.3 undecidable manual S 32 0.3076 50 0.52 64
IV.CSP1.EHZ. 2019-02-20T09:26:36.45 0.3 undecidable manual S 14 0.2968 50 -0.03 72
IV.EL6.EHZ. 2019-02-20T09:26:35.63 0.3 undecidable manual P 359 0.5261 50 0.04 68
IV.CESI.HHZ. 2019-02-20T09:26:34.91 0.3 undecidable manual S 323 0.2509 50 -0.22 69
IV.PAOL.HNZ. 2019-02-20T09:26:34.18 3.0 undecidable manual Sn -9.99 0
IV.FDMO.HHZ. 2019-02-20T09:26:34.28 0.3 undecidable manual S 356 0.2338 50 -0.33 68
IV.GIGS.HHZ. 2019-02-20T09:26:34.81 0.3 undecidable manual P 136 0.4883 50 -0.14 67
IV.SMA1.EHZ. 2019-02-20T09:26:34.68 0.3 undecidable manual S 136 0.2392 50 -0.1 71
IV.MTRA.HNZ. 2019-02-20T09:26:34.09 0.3 undecidable manual S 102 0.2158 50 0.01 73
IV.MOMA.HHZ. 2019-02-20T09:26:33.54 3.0 undecidable manual Sg 3.57 0
IV.GAVE.EHZ. 2019-02-20T09:26:33.49 0.1 undecidable manual S 235 0.1934 116 0.09 96
IV.LNSS.HHZ. 2019-02-20T09:26:33.78 0.3 undecidable manual S 194 0.2068 50 -0.02 73
IV.TERO.HHZ. 2019-02-20T09:26:33.36 0.1 undecidable manual P 116 0.4056 50 -0.17 91
IV.MF5.EHZ. 2019-02-20T09:26:32.25 0.3 undecidable manual P 54 0.3157 50 0.25 68
IV.MMO1.EHZ. 2019-02-20T09:26:32.83 0.3 undecidable manual S 59 0.1862 117 -0.33 69
IV.GUMA.HHZ. 2019-02-20T09:26:32.14 0.3 undecidable manual P 32 0.3076 50 0.28 68
IV.MC2.EHZ. 2019-02-20T09:26:31.30 0.3 undecidable manual S 28 0.1232 128 0.2 71
IV.CSP1.EHZ. 2019-02-20T09:26:31.63 0.1 undecidable manual P 14 0.2968 50 -0.05 95
IV.LNSS.HHZ. 2019-02-20T09:26:30.21 0.1 undecidable manual P 194 0.2068 50 0.08 96
IV.SMA1.EHZ. 2019-02-20T09:26:30.75 0.3 undecidable manual P 136 0.2392 50 0.06 72
IV.MTRA.HNZ. 2019-02-20T09:26:30.25 0.3 undecidable manual P 102 0.2158 50 -0.04 73
IV.CESI.HHZ. 2019-02-20T09:26:30.82 0.3 undecidable manual P 323 0.2509 50 -0.07 72
IV.VIVA.HHZ. 2019-02-20T09:26:30.71 3.0 undecidable manual Sg -3.48 0
IV.FDMO.HHZ. 2019-02-20T09:26:30.51 0.3 undecidable manual P 356 0.2338 50 -0.08 72
IV.GAVE.EHZ. 2019-02-20T09:26:29.98 0.3 undecidable manual P 235 0.1934 116 0.09 72
IV.MMO1.EHZ. 2019-02-20T09:26:29.67 0.3 undecidable manual P 59 0.1862 117 -0.09 72
IV.MC2.EHZ. 2019-02-20T09:26:28.79 0.3 undecidable manual P 28 0.1232 128 0.22 71
IV.NRCA.HHZ. 2019-02-20T09:26:28.78 0.1 undecidable manual S 7 0.0306 162 -0.17 97
IV.NRCA.HHZ. 2019-02-20T09:26:27.38 0.1 undecidable manual P 7 0.0306 162 0.05 100
IV.PTRP.HHZ. 2019-02-20T09:26:20.45 3.0 positive manual Pn -2.78 0
IV.VBKN.HHZ. 2019-02-20T09:26:17.32 3.0 positive manual Pg 4.78 0
IV.APEC.HHZ. 2019-02-20T09:26:09.36 3.0 undecidable manual Pg 6.74 0
IV.ATFO.HHZ. 2019-02-20T09:26:03.03 3.0 undecidable manual P 1.26 0
IT.OPI.HGZ. 2019-02-20T09:26:00.91 3.0 undecidable manual P -3.62 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.8 0.0001665 0.08 AML other m 2019-02-20T09:26:40.45
IV.NRCA.HNN. ML:2.2 0.0029 0.06 AML other m 2019-02-20T09:26:28.90
IV.NRCA.HHN. ML:2.3 0.00343 0.14 AML other m 2019-02-20T09:26:28.80
IV.MTRA.HNN. ML:1.7 0.00031 0.74 AML other m 2019-02-20T09:26:34.55
IV.FDMO.HHN. ML:1.4 0.000156 1.04 AML other m 2019-02-20T09:26:34.46
IV.MTRA.EHE. ML:1.6 0.0002355 0.56 AML other m 2019-02-20T09:26:35.76
IV.MF5.EHE. ML:0 0.00014076 0.22 AML other m 2019-02-20T09:26:38.44
IV.MF5.EHN. ML:0 0.00010825 0.62 AML other m 2019-02-20T09:26:38.46
IV.TERO.HHE. ML:1.5 9.175E-5 0.34 AML other m 2019-02-20T09:26:40.45
IV.NRCA.HHE. ML:2.5 0.004860841 0.16 AML other m 2019-02-20T09:26:28.80
IV.GAVE.EHE. ML:1.7 0.000374145 0.1792 AML other m 2019-02-20T09:26:34.16
IV.GAVE.EHN. ML:1.7 0.0003268279 0.1216 AML other m 2019-02-20T09:26:34.14
IV.GAVE.HNE. ML:1.8 0.00041468105 0.1728 AML other m 2019-02-20T09:26:34.16
IV.LNSS.HHE. ML:1.7 0.0003428062 0.1408 AML other m 2019-02-20T09:26:34.51
IV.LNSS.HHN. ML:1.7 0.00030582035 0.16 AML other m 2019-02-20T09:26:34.79
IV.LNSS.HNE. ML:1.7 0.00032395845 0.128 AML other m 2019-02-20T09:26:34.52
IV.LNSS.HNN. ML:1.7 0.00029693255 0.1472 AML other m 2019-02-20T09:26:34.72
IV.MTRA.EHN. ML:1.5 0.000191428615 0.16 AML other m 2019-02-20T09:26:34.55
IV.MTRA.HNE. ML:1.6 0.00023219855 0.1024 AML other m 2019-02-20T09:26:35.75
IV.FDMO.HHE. ML:1.3 0.000112317 0.1792 AML other m 2019-02-20T09:26:35.05
IV.SMA1.EHE. ML:1.4 0.00014132205 0.48 AML other m 2019-02-20T09:26:38.52
IV.SMA1.EHN. ML:1.3 0.000111510465 0.3776 AML other m 2019-02-20T09:26:41.17
IV.CESI.HHE. ML:1.4 0.0001149201 0.1792 AML other m 2019-02-20T09:26:36.34
IV.CESI.HHN. ML:1.5 0.00014844506 0.096 AML other m 2019-02-20T09:26:35.34
IV.GUMA.HHE. ML:1.8 0.0002394191 0.3584 AML other m 2019-02-20T09:26:41.69
IV.GUMA.HHN. ML:1.7 0.00022491305 0.3392 AML other m 2019-02-20T09:26:41.33
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
Waveforms Seismic signals in full SEED format Download