Earthquake with magnitude of ML 1.1 on date 21-08-2019 and time 10:06:04 (Italy) in region 3 km NE Trevi (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km NE Trevi (PG), on

  • 21-08-2019 08:06:04 (UTC)
  • 21-08-2019 10:06:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9, 12.76 at 10 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
Foligno PG 8 57155 65624
Montefalco PG 9 5679 71303
Campello sul Clitunno PG 9 2442 73745
Castel Ritaldi PG 11 3278 77023
Spello PG 13 8645 85668
Bevagna PG 13 5081 90749
Sellano PG 14 1079 91828
Cerreto di Spoleto PG 16 1075 92903
Giano dell'Umbria PG 16 3846 96749
Gualdo Cattaneo PG 17 6155 102904
Vallo di Nera PG 17 364 103268
Valtopina PG 18 1398 104666
Cannara PG 18 4305 108971
Spoleto PG 18 38218 147189
Sant'Anatolia di Narco PG 19 564 147753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km SE of Foligno (57155 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
39 Km N of Terni (111501 inhabitants)
76 Km NE of Viterbo (67173 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 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 1.1 2019-08-21
08:06:04
42.9 12.76 10 2019-08-21
08:18:55
Sala Sismica INGV-Roma 71671381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-21 08:06:04 ± 0.07
Latitude 42.90 ± 0.00
Longitude 12.76 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71671381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 578
Semi-minor axis of confidence ellipse (meter) 433
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 16
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) 0.37861
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.5
Num. used stations 14
Type of magnitude ML
Reference to an origin 71671381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-21 08:18:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ACER.HHZ. 2019-08-21T08:07:52.34 3.0 undecidable manual Sg 12.89 0
ST.RONC.EHZ. 2019-08-21T08:07:50.62 3.0 undecidable manual Sg 9.55 0
IV.ILLI.HHZ. 2019-08-21T08:07:36.50 3.0 undecidable manual Pg 16.48 0
IT.ORP.HGZ. 2019-08-21T08:07:29.83 3.0 undecidable manual Sg 7.76 0
IV.SPS2.HHZ. 2019-08-21T08:07:28.81 3.0 negative manual Pg 12.1 0
IV.SCIAC.HHZ. 2019-08-21T08:07:28.22 3.0 undecidable manual Pn -0.33 0
IV.NDIM.HNZ. 2019-08-21T08:07:14.32 3.0 undecidable manual Sn -1.35 0
IV.VAGA.HHZ. 2019-08-21T08:07:03.56 3.0 undecidable manual Sn -3.33 0
IT.ORP.HGZ. 2019-08-21T08:06:50.96 3.0 positive manual Pn 2.27 0
IV.RMP.HHZ. 2019-08-21T08:06:44.02 3.0 undecidable manual S -4 0
IV.CSFT.HHZ. 2019-08-21T08:06:43.16 3.0 positive manual Pn -3.4 0
IV.FAGN.HHZ. 2019-08-21T08:06:40.46 3.0 undecidable manual S -1.51 0
IV.ARRO.EHZ. 2019-08-21T08:06:16.62 3.0 negative manual P 1.7 0
IV.NRCA.HHZ. 2019-08-21T08:06:15.08 0.6 undecidable manual S 104 0.268 50 0.28 63
IV.FDMO.HHZ. 2019-08-21T08:06:15.28 0.6 undecidable manual S 60 0.2761 50 0.25 63
IV.MML1.HNZ. 2019-08-21T08:06:14.82 0.6 undecidable manual S 36 0.2644 50 0.14 65
IV.CSP1.EHZ. 2019-08-21T08:06:12.29 1.0 negative manual P 59 0.3786 50 0.12 32
IV.ASSB.HHZ. 2019-08-21T08:06:11.10 0.3 undecidable manual S 333 0.161 119 -0.11 99
IV.MOMA.HNZ. 2019-08-21T08:06:11.53 0.6 undecidable manual S 235 0.1682 118 0.07 67
IV.NRCA.HHZ. 2019-08-21T08:06:10.02 0.3 undecidable manual P 104 0.268 50 -0.27 94
IV.FDMO.HHZ. 2019-08-21T08:06:10.32 0.6 positive manual P 60 0.2761 50 -0.1 65
IV.CESI.HNZ. 2019-08-21T08:06:10.88 0.6 undecidable manual S 45 0.1502 121 0.04 67
IV.MML1.HNZ. 2019-08-21T08:06:10.00 0.6 undecidable manual P 36 0.2644 50 -0.22 64
IT.FOPC.HGZ. 2019-08-21T08:06:09.71 1.0 undecidable manual S 330 0.0809 138 0.93 26
IV.GAVE.EHZ. 2019-08-21T08:06:09.55 0.3 undecidable manual P 154 0.2293 111 -0.05 99
IV.MOMA.HNZ. 2019-08-21T08:06:08.44 0.3 undecidable manual P 235 0.1682 118 0.08 100
IV.ASSB.HHZ. 2019-08-21T08:06:07.90 0.6 negative manual P 333 0.161 119 -0.32 64
IV.CESI.HNZ. 2019-08-21T08:06:07.87 0.3 undecidable manual P 45 0.1502 121 -0.14 99
IT.FOPC.HGZ. 2019-08-21T08:06:06.96 0.6 undecidable manual P 330 0.0809 138 0.15 67
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.1 0.00011047958 0.3008 AML other m 2019-08-21T08:06:11.97
IV.ASSB.HHN. ML:1 9.208201E-5 0.1792 AML other m 2019-08-21T08:06:11.89
IV.GAVE.EHE. ML:1 6.65838E-5 0.16 AML other m 2019-08-21T08:06:16.91
IV.GAVE.EHN. ML:1.1 7.54006E-5 0.0832 AML other m 2019-08-21T08:06:16.99
IV.GAVE.HNE. ML:6.1 7.060956 1.3376 AML other m 2019-08-21T08:06:09.99
IV.GAVE.HNN. ML:5.2 0.96948685 1.3248 AML other m 2019-08-21T08:06:11.62
IV.NRCA.HHE. ML:0.9 3.3618885E-5 0.1216 AML other m 2019-08-21T08:06:16.40
IV.NRCA.HHN. ML:0.9 3.501856E-5 0.1408 AML other m 2019-08-21T08:06:16.99
IV.NRCA.HNE. ML:1.3 9.175304E-5 0.8 AML other m 2019-08-21T08:06:11.37
IV.NRCA.HNN. ML:1.5 0.0001591907 0.9792 AML other m 2019-08-21T08:06:10.67
IV.FDMO.HHE. ML:0.9 4.074778E-5 0.3584 AML other m 2019-08-21T08:06:16.21
IV.FDMO.HHN. ML:0.9 4.109276E-5 0.256 AML other m 2019-08-21T08:06:15.88
IV.CSP1.EHE. ML:1 3.0465255E-5 0.32 AML other m 2019-08-21T08:06:21.76
IV.CSP1.EHN. ML:1 3.7120485E-5 0.3584 AML other m 2019-08-21T08:06:20.94
IV.CSFT.HHE. ML:4.1 0.0020702475 0.1216 AML other m 2019-08-21T08:07:03.98
IV.CSFT.HHN. ML:4.2 0.002706951 0.1152 AML other m 2019-08-21T08:07:05.71
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