Earthquake with magnitude of ML 0.8 on date 18-09-2019 and time 21:55:37 (Italy) in region 3 km NE Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 3 km NE Norcia (PG), on

  • 18-09-2019 19:55:37 (UTC)
  • 18-09-2019 21:55:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.81, 13.12 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 3 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Preci PG 10 724 5962
Visso MC 13 1107 7069
Cascia PG 14 3217 10286
Ussita MC 15 444 10730
Arquata del Tronto AP 15 1178 11908
Cerreto di Spoleto PG 17 1075 12983
Accumoli RI 17 667 13650
Montegallo AP 18 523 14173
Sellano PG 18 1079 15252
Poggiodomo PG 19 117 15369
Montemonaco AP 19 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km W of Pescara (121014 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
100 Km NW of Chieti (51815 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 0.8 2019-09-18
19:55:37
42.81 13.12 11 2019-09-18
20:02:46
Sala Sismica INGV-Roma 72532611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-18 19:55:37 ± 0.09
Latitude 42.81 ± 0.00
Longitude 13.12 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72532611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 488
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 58
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.402
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 72532611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-18 20:02:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
RF.GEPF.HHZ. 2019-09-18T19:57:06.58 3.0 undecidable manual Sn -4.58 0
IV.PZUN.HHZ. 2019-09-18T19:56:57.17 3.0 undecidable manual Sn -0.93 0
GU.CARD.HHZ. 2019-09-18T19:56:47.45 3.0 undecidable manual Sn 4.68 0
IV.IMI.HHZ. 2019-09-18T19:56:44.62 3.0 undecidable manual Pn 7.56 0
GU.GORR.HHZ. 2019-09-18T19:56:30.42 3.0 undecidable manual Pn 2.51 0
IV.RNI2.HHZ. 2019-09-18T19:56:18.28 3.0 undecidable manual S -0.62 0
IV.IOCA.HHZ. 2019-09-18T19:56:14.75 3.0 positive manual Pn 3.32 0
IV.SAMA.HHZ. 2019-09-18T19:56:12.90 3.0 undecidable manual S -0.79 0
IV.TERO.HHZ. 2019-09-18T19:55:51.28 0.6 undecidable manual S 118 0.402 50 -0.4 47
IV.T1299.EHZ. 2019-09-18T19:55:46.33 0.6 undecidable manual S 147 0.2149 50 0.2 50
IV.FDMO.HHZ. 2019-09-18T19:55:46.32 0.3 undecidable manual S 353 0.2239 50 -0.06 77
IV.GAVE.EHZ. 2019-09-18T19:55:45.72 0.3 undecidable manual S 234 0.2068 50 -0.17 77
IV.TERO.HHZ. 2019-09-18T19:55:45.82 0.3 undecidable manual P 118 0.402 50 0.24 71
IV.MMO1.EHZ. 2019-09-18T19:55:44.47 0.3 undecidable manual S 60 0.1727 50 -0.4 72
IV.MC2.EHZ. 2019-09-18T19:55:43.23 0.6 undecidable manual S 27 0.1088 132 0.36 49
IV.CSP1.EHZ. 2019-09-18T19:55:43.67 0.6 negative manual P 12 0.2842 50 0.12 50
IV.SMA1.EHZ. 2019-09-18T19:55:43.23 1.0 positive manual P 139 0.241 50 0.4 24
IV.FDMO.HHZ. 2019-09-18T19:55:42.55 0.6 positive manual P 353 0.2239 50 0.03 52
IV.LNSS.HHZ. 2019-09-18T19:55:42.25 0.3 undecidable manual P 196 0.2194 50 -0.2 76
IV.GAVE.EHZ. 2019-09-18T19:55:42.27 1.0 negative manual P 234 0.2068 50 0.04 26
IV.T1299.EHZ. 2019-09-18T19:55:42.53 0.1 undecidable manual P 147 0.2149 50 0.16 100
IV.MMO1.EHZ. 2019-09-18T19:55:41.53 1.0 undecidable manual P 60 0.1727 50 -0.11 26
IV.MC2.EHZ. 2019-09-18T19:55:40.70 1.0 undecidable manual P 27 0.1088 132 0.21 25
IV.NRCA.HHZ. 2019-09-18T19:55:39.40 0.6 undecidable manual P 344 0.0198 168 -0.06 54
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1 0.000174 1.06 AML other m 2019-09-18T19:55:40.78
IV.NRCA.HHN. ML:0.9 0.000135 0.9 AML other m 2019-09-18T19:55:41.92
IV.GAVE.EHN. ML:0.7 3.13E-5 0.84 AML other m 2019-09-18T19:55:46.44
IV.GAVE.EHE. ML:0.8 4.34E-5 0.48 AML other m 2019-09-18T19:55:46.67
IV.FDMO.HHN. ML:0.7 2.895E-5 0.42 AML other m 2019-09-18T19:55:46.47
IV.FDMO.HHE. ML:0.7 2.82E-5 0.52 AML other m 2019-09-18T19:55:47.30
IV.SAMA.HHN. ML:2.6 0.000267 0.04 AML other m 2019-09-18T19:56:13.19
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