Earthquake with magnitude of ML 1.1 on date 19-08-2019 and time 23:14:15 (UTC) in region 9 km SW Spoleto (PG)

A magnitude ML 1.1 earthquake occured in region: 9 km SW Spoleto (PG), on

  • 19-08-2019 23:14:15 (UTC)
  • 20-08-2019 01:14:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.67, 12.69 at 8 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
Spoleto PG 9 38218 38218
Ferentillo TR 10 1913 40131
Montefranco TR 10 1276 41407
Arrone TR 11 2763 44170
Acquasparta TR 12 4778 48948
Terni TR 12 111501 160449
San Gemini TR 13 5018 165467
Scheggino PG 13 461 165928
Sant'Anatolia di Narco PG 14 564 166492
Polino TR 16 233 166725
Montecastrilli TR 16 5022 171747
Castel Ritaldi PG 18 3278 175025
Labro RI 18 374 175399
Massa Martana PG 18 3770 179169
Vallo di Nera PG 18 364 179533
Stroncone TR 19 4917 184450
Campello sul Clitunno PG 19 2442 186892
Morro Reatino RI 20 373 187265
Colli sul Velino RI 20 533 187798

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km N of Terni (111501 inhabitants)
32 Km S of Foligno (57155 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
55 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
74 Km N of Guidonia Montecelio (88673 inhabitants)
79 Km N of Tivoli (56533 inhabitants)
83 Km W of Teramo (54892 inhabitants)
88 Km N of Roma (2864731 inhabitants)
97 Km NE of Civitavecchia (52991 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 2019-08-19
23:14:15
42.67 12.69 8 2019-08-19
23:23:03
Sala Sismica INGV-Roma 71636021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-19 23:14:15 ± 0.05
Latitude 42.67 ± 0.00
Longitude 12.69 ± 0.00
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71636021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 335
Semi-minor axis of confidence ellipse (meter) 257
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.47214
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 71636021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-19 23:23:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2019-08-19T23:14:32.84 0.1 undecidable manual S 38 0.4721 50 0.09 91
IV.ASSB.HHZ. 2019-08-19T23:14:30.29 0.1 undecidable manual S 357 0.3768 50 0.35 88
IV.NRCA.HHZ. 2019-08-19T23:14:29.10 0.1 undecidable manual S 62 0.3552 50 -0.19 92
IV.LNSS.HHE. 2019-08-19T23:14:26.17 0.3 undecidable manual S 104 0.2671 106 -0.21 70
IV.MGAB.HHZ. 2019-08-19T23:14:26.24 3.0 undecidable manual P 0.21 0
IV.FDMO.HHZ. 2019-08-19T23:14:25.25 0.1 undecidable manual P 38 0.4721 50 -0.3 87
IV.NRCA.HHZ. 2019-08-19T23:14:23.70 0.1 undecidable manual P 62 0.3552 50 0.16 92
IV.ASSB.HHZ. 2019-08-19T23:14:23.80 0.1 undecidable manual P 357 0.3768 50 -0.13 92
IV.MOMA.HHZ. 2019-08-19T23:14:22.50 0.1 undecidable manual S 328 0.1628 115 -0.1 97
IT.GNU.HGE. 2019-08-19T23:14:22.57 0.3 undecidable manual S 328 0.1628 115 -0.02 74
IV.GAVE.EHZ. 2019-08-19T23:14:22.50 0.1 undecidable manual S 80 0.1538 116 0.2 95
IV.LNSS.HHE. 2019-08-19T23:14:21.83 0.3 undecidable manual P 104 0.2671 106 -0.04 72
IT.TRN1.HGE. 2019-08-19T23:14:20.85 0.3 undecidable manual S 196 0.1124 124 -0.04 74
IV.CESX.HHZ. 2019-08-19T23:14:20.32 0.1 undecidable manual S 232 0.0935 129 -0.01 100
IV.ARRO.EHZ. 2019-08-19T23:14:20.74 0.1 undecidable manual S 147 0.1043 126 0.1 98
IT.GNU.HGE. 2019-08-19T23:14:19.82 0.3 undecidable manual P 328 0.1628 115 0.14 72
IV.GAVE.EHZ. 2019-08-19T23:14:19.53 0.1 undecidable manual P 80 0.1538 116 0.02 99
IT.TRN1.HGE. 2019-08-19T23:14:19.12 0.3 undecidable manual P 196 0.1124 124 0.42 69
IV.MOMA.HHZ. 2019-08-19T23:14:19.62 0.1 undecidable manual P 328 0.1628 115 -0.07 98
IV.ARRO.EHZ. 2019-08-19T23:14:18.47 0.1 undecidable manual P 147 0.1043 126 -0.09 98
IV.CESX.HHZ. 2019-08-19T23:14:18.24 0.1 undecidable manual P 232 0.0935 129 -0.13 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.4 0.00032073935 0.4992 AML other m 2019-08-19T23:14:21.93
IV.CESX.HHN. ML:1.2 0.00023153895 0.32 AML other m 2019-08-19T23:14:21.68
IV.ARRO.EHE. ML:1.2 0.0002176824 0.2816 AML other m 2019-08-19T23:14:22.76
IV.ARRO.EHN. ML:1.2 0.0001842953 0.32 AML other m 2019-08-19T23:14:22.70
IV.GAVE.EHE. ML:1.1 0.000110410505 0.3328 AML other m 2019-08-19T23:14:24.06
IV.GAVE.EHN. ML:1 8.3986665E-5 0.2816 AML other m 2019-08-19T23:14:24.86
IV.GAVE.HNE. ML:1.2 0.00014778011 0.32 AML other m 2019-08-19T23:14:24.06
IV.GAVE.HNN. ML:1.2 0.0001356027 0.704 AML other m 2019-08-19T23:14:21.84
IV.MOMA.HHE. ML:1.2 0.00014100885 0.1792 AML other m 2019-08-19T23:14:24.95
IV.MOMA.HHN. ML:1.3 0.00018463625 0.256 AML other m 2019-08-19T23:14:23.77
IV.MOMA.HNE. ML:1.2 0.0001265575 0.2432 AML other m 2019-08-19T23:14:23.94
IV.NRCA.HHE. ML:0.6 1.56230695E-5 0.1664 AML other m 2019-08-19T23:14:33.41
IV.NRCA.HHN. ML:0.6 1.6462055E-5 0.1664 AML other m 2019-08-19T23:14:31.88
IV.ASSB.HHN. ML:0.8 2.0169585E-5 0.2816 AML other m 2019-08-19T23:14:32.13
IV.FDMO.HHE. ML:0.6 1.11703845E-5 0.3456 AML other m 2019-08-19T23:14:34.98
IV.FDMO.HHN. ML:0.3 7.311458E-6 0.1408 AML other m 2019-08-19T23:14:34.91
IV.MGAB.HHN. ML:0.9 2.203175E-5 0.1792 AML other m 2019-08-19T23:14:35.64
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