Earthquake with magnitude of ML 0.8 on date 31-08-2019 and time 22:08:53 (UTC) in region 3 km W Trevi (PG)

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

  • 31-08-2019 22:08:53 (UTC)
  • 01-09-2019 00:08:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.87, 12.72 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
Trevi PG 3 8469 8469
Castel Ritaldi PG 6 3278 11747
Montefalco PG 6 5679 17426
Campello sul Clitunno PG 7 2442 19868
Foligno PG 10 57155 77023
Bevagna PG 12 5081 82104
Giano dell'Umbria PG 12 3846 85950
Gualdo Cattaneo PG 14 6155 92105
Spello PG 15 8645 100750
Spoleto PG 15 38218 138968
Vallo di Nera PG 16 364 139332
Cerreto di Spoleto PG 17 1075 140407
Sellano PG 17 1079 141486
Sant'Anatolia di Narco PG 18 564 142050
Cannara PG 18 4305 146355
Massa Martana PG 19 3770 150125
Scheggino PG 19 461 150586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km S of Foligno (57155 inhabitants)
34 Km N of Terni (111501 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
71 Km NE of Viterbo (67173 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
84 Km W of Teramo (54892 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
96 Km N of Guidonia Montecelio (88673 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 2019-08-31
22:08:53
42.87 12.72 8 2019-08-31
22:13:54
Sala Sismica INGV-Roma 71985771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-31 22:08:53 ± 0.07
Latitude 42.87 ± 0.01
Longitude 12.72 ± 0.02
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71985771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1580
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 291
Circular confidence region, given by single value of horizontal uncertainty (meter) 1580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 12
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) 0.41998
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 71985771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-31 22:13:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MBAL.EHZ. 2019-08-31T22:10:25.46 3.0 undecidable manual Sn 1.4 0
GU.GSCL.HHZ. 2019-08-31T22:09:57.23 3.0 undecidable manual Sn -3.01 0
IV.CSNT.HHZ. 2019-08-31T22:09:19.35 3.0 positive manual P 0.79 0
IV.PESA.HHZ. 2019-08-31T22:09:13.37 3.0 undecidable manual P -2.67 0
IV.CSP1.EHZ. 2019-08-31T22:09:09.66 0.1 undecidable manual S 57 0.42 50 0.14 92
IV.FDMO.HHZ. 2019-08-31T22:09:06.31 0.1 undecidable manual S 58 0.3175 50 -0.18 95
IV.ARRO.EHZ. 2019-08-31T22:09:05.67 0.1 undecidable manual S 173 0.2896 104 0.24 96
IV.NRCA.HHZ. 2019-08-31T22:09:05.79 0.1 undecidable manual S 96 0.2905 104 0.3 96
IV.CSP1.EHZ. 2019-08-31T22:09:02.91 0.1 undecidable manual P 57 0.42 50 -0.03 96
IV.FDMO.HHZ. 2019-08-31T22:09:01.00 0.6 positive manual P 58 0.3175 50 -0.19 47
IV.ASSB.HHZ. 2019-08-31T22:09:01.52 0.1 undecidable manual S 346 0.1817 112 0.05 100
IV.ATCC.EHZ. 2019-08-31T22:09:01.13 3.0 undecidable manual P -0.01 0
IV.NRCA.HHZ. 2019-08-31T22:09:00.61 0.6 negative manual P 96 0.2905 104 0 48
IV.ARRO.EHZ. 2019-08-31T22:09:00.75 0.1 undecidable manual P 173 0.2896 104 0.17 96
IV.MOMA.HHZ. 2019-08-31T22:08:59.50 0.1 undecidable manual S 240 0.1268 120 -0.06 100
IV.ASSB.HHZ. 2019-08-31T22:08:58.33 0.3 negative manual P 346 0.1817 112 0.04 75
IV.MOMA.HHZ. 2019-08-31T22:08:57.17 0.6 positive manual P 240 0.1268 120 -0.01 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:0.9 9.11E-5 0.18 AML other m 2019-08-31T22:08:59.81
IV.MOMA.HHN. ML:0.9 9.39E-5 1.56 AML other m 2019-08-31T22:09:01.00
IV.ASSB.HHN. ML:0.9 6.22E-5 0.3 AML other m 2019-08-31T22:09:01.82
IV.ASSB.HHE. ML:0.7 4.06E-5 0.42 AML other m 2019-08-31T22:09:01.70
IV.NRCA.HHN. ML:0.9 3.31E-5 0.12 AML other m 2019-08-31T22:09:06.11
IV.NRCA.HHE. ML:0.8 3.215E-5 0.12 AML other m 2019-08-31T22:09:06.81
IV.FDMO.HHN. ML:0.4 1.0315E-5 1.14 AML other m 2019-08-31T22:09:07.84
IV.FDMO.HHE. ML:0.6 1.34E-5 0.42 AML other m 2019-08-31T22:09:07.90
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