Earthquake with magnitude of ML 1.3 on date 25-08-2018 and time 07:50:16 (Italy) in region 2 km W Sellano (PG)

A magnitude ML 1.3 earthquake occured in region: 2 km W Sellano (PG), on

  • 25-08-2018 05:50:16 (UTC)
  • 25-08-2018 07:50:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9, 12.9 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
Sellano PG 3 1079 1079
Cerreto di Spoleto PG 9 1075 2154
Preci PG 12 724 2878
Trevi PG 13 8469 11347
Campello sul Clitunno PG 13 2442 13789
Monte Cavallo MC 14 145 13934
Vallo di Nera PG 15 364 14298
Visso MC 16 1107 15405
Foligno PG 17 57155 72560
Sant'Anatolia di Narco PG 19 564 73124
Norcia PG 20 4957 78081
Serravalle di Chienti MC 20 1070 79151

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
48 Km E of Perugia (166134 inhabitants)
71 Km W of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 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 1.3 2018-08-25
05:50:16
42.9 12.9 10 2018-08-25
05:57:36
Sala Sismica INGV-Roma 60185791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-25 05:50:16 ± 0.09
Latitude 42.90 ± 0.00
Longitude 12.90 ± 0.01
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 60185791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 464
Semi-minor axis of confidence ellipse (meter) 175
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 14
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) 0.31206
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 60185791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-25 05:57:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2018-08-25T05:50:38.34 3.0 undecidable manual S -0.1 0
IV.CSP1.EHZ. 2018-08-25T05:50:28.68 0.1 undecidable manual S 49 0.295 50 0.29 91
IV.MMO1.EHZ. 2018-08-25T05:50:28.81 0.1 undecidable manual S 90 0.3121 50 -0.1 94
IV.MC2.EHZ. 2018-08-25T05:50:26.00 0.1 undecidable manual S 86 0.2122 112 0.32 92
IV.EL6.EHZ. 2018-08-25T05:50:26.27 3.0 undecidable manual P -0.01 0
OB.GAVE.EHZ. 2018-08-25T05:50:25.53 0.1 undecidable manual S 181 0.2068 113 0.05 98
IV.ATCC.EHZ. 2018-08-25T05:50:24.54 3.0 negative manual P 0.17 0
IV.ARRO.EHZ. 2018-08-25T05:50:24.31 3.0 negative manual P -0.05 0
IV.NRCA.HHZ. 2018-08-25T05:50:24.06 0.1 undecidable manual S 112 0.17 117 -0.14 96
IV.FDMO.HHZ. 2018-08-25T05:50:24.90 0.1 undecidable manual S 45 0.1943 114 -0.14 96
IV.MMO1.EHZ. 2018-08-25T05:50:23.63 0.1 undecidable manual P 90 0.3121 50 -0.19 93
IV.CSP1.EHZ. 2018-08-25T05:50:23.44 0.1 undecidable manual P 49 0.295 50 -0.08 95
IV.CESI.HHZ. 2018-08-25T05:50:22.11 0.1 undecidable manual S 2 0.1061 129 -0.02 100
IV.MC2.EHZ. 2018-08-25T05:50:22.25 1.0 negative manual P 86 0.2122 112 0.3 23
IV.FDMO.HHZ. 2018-08-25T05:50:21.48 0.1 undecidable manual P 45 0.1943 114 -0.11 97
OB.GAVE.EHZ. 2018-08-25T05:50:21.93 0.1 undecidable manual P 181 0.2068 113 0.09 97
IV.NRCA.HHZ. 2018-08-25T05:50:21.01 0.1 negative manual P 112 0.17 117 -0.09 97
IV.CESI.HHZ. 2018-08-25T05:50:19.98 0.1 positive manual P 2 0.1061 129 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.5 0.000411 0.2 AML other m 2018-08-25T05:50:22.33
IV.CESI.HHE. ML:1.2 0.0002095 0.48 AML other m 2018-08-25T05:50:22.67
IV.NRCA.HHN. ML:1.5 0.000253 0.48 AML other m 2018-08-25T05:50:24.50
IV.NRCA.HHE. ML:1.6 0.000299 0.16 AML other m 2018-08-25T05:50:24.22
IV.FDMO.HHE. ML:1.3 0.0001259 0.2 AML other m 2018-08-25T05:50:25.05
IV.FDMO.HHN. ML:1.1 8.75E-5 0.4 AML other m 2018-08-25T05:50:25.30
OB.GAVE.EHE. ML:1.6 0.0002515 0.98 AML other m 2018-08-25T05:50:26.04
OB.GAVE.EHN. ML:1.4 0.0001785 0.38 AML other m 2018-08-25T05:50:27.52
IV.ARRO.EHN. ML:1.3 6.91E-5 0.2 AML other m 2018-08-25T05:50:30.72
IV.ARRO.EHE. ML:1.2 6.145E-5 0.16 AML other m 2018-08-25T05:50:31.40
IV.ATCC.EHE. ML:0.9 3.195E-5 0.66 AML other m 2018-08-25T05:50:31.45
IV.ATCC.EHN. ML:1 3.82E-5 1.38 AML other m 2018-08-25T05:50:32.97
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