ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 0.5 on date 17-03-2019 and time 02:46:20 (UTC) in region 9 km SE Valtopina (PG)

A magnitude ML 0.5 earthquake occured in region: 9 km SE Valtopina (PG), on

  • 17-03-2019 02:46:20 (UTC)
  • 17-03-2019 03:46:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.99, 12.81 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
Valtopina PG 9 1398 1398
Foligno PG 9 57155 58553
Spello PG 11 8645 67198
Trevi PG 13 8469 75667
Nocera Umbra PG 14 5839 81506
Sellano PG 15 1079 82585
Serravalle di Chienti MC 15 1070 83655
Monte Cavallo MC 16 145 83800
Montefalco PG 16 5679 89479
Bevagna PG 17 5081 94560
Assisi PG 18 28299 122859
Cannara PG 18 4305 127164
Campello sul Clitunno PG 19 2442 129606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Foligno (57155 inhabitants)
36 Km E of Perugia (166134 inhabitants)
49 Km N of Terni (111501 inhabitants)
82 Km W of Teramo (54892 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
97 Km S of Fano (60888 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 0.5 2019-03-17
02:46:20
42.99 12.81 11 2019-03-17
02:54:02
Sala Sismica INGV-Roma 66619961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-17 02:46:20 ± 0.06
Latitude 42.99 ± 0.00
Longitude 12.81 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66619961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 505
Semi-minor axis of confidence ellipse (meter) 319
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 360
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.25361
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 66619961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-17 02:54:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LPDG.HHZ. 2019-03-17T02:48:05.32 3.0 negative manual Pg 2.43 0
OT.TAR1.HHZ. 2019-03-17T02:47:54.75 3.0 undecidable manual Sn -2.95 0
IV.RESU.HHZ. 2019-03-17T02:47:36.26 3.0 undecidable manual Pg 2.48 0
IV.FIR.HHZ. 2019-03-17T02:47:08.15 3.0 undecidable manual Sg 0.48 0
GU.GRAM.HHZ. 2019-03-17T02:47:06.31 3.0 positive manual Pg 6.43 0
IV.MBAL.EHZ. 2019-03-17T02:47:05.08 3.0 undecidable manual Pn -0.8 0
IV.PAOL.HHZ. 2019-03-17T02:46:47.88 3.0 undecidable manual Pg -1.86 0
IV.FIR.HHZ. 2019-03-17T02:46:41.65 3.0 undecidable manual Pg -3.14 0
IV.LIK.EHZ.01 2019-03-17T02:46:32.17 3.0 positive manual P -8.54 0
IV.MOMA.HHZ. 2019-03-17T02:46:30.51 0.3 undecidable manual S 223 0.2536 50 0.04 74
IV.ATCC.EHZ. 2019-03-17T02:46:29.94 0.3 undecidable manual S 328 0.2302 50 0.15 73
IV.FDMO.HHZ. 2019-03-17T02:46:28.91 0.3 undecidable manual S 77 0.2104 50 -0.28 71
IV.ASSB.HHZ. 2019-03-17T02:46:26.20 0.3 undecidable manual S 296 0.1205 129 -0.23 73
IV.MOMA.HHZ. 2019-03-17T02:46:26.22 0.3 undecidable manual P 223 0.2536 50 -0.01 74
IV.ATCC.EHZ. 2019-03-17T02:46:25.92 0.3 undecidable manual P 328 0.2302 50 0.08 74
IV.FDMO.HHZ. 2019-03-17T02:46:25.54 0.3 undecidable manual P 77 0.2104 50 0.04 74
IV.CESI.HHZ. 2019-03-17T02:46:25.23 0.3 undecidable manual S 78 0.0737 143 0.07 76
IV.CESI.HHZ. 2019-03-17T02:46:23.30 0.1 undecidable manual P 78 0.0737 143 0.13 100
IV.ASSB.HHZ. 2019-03-17T02:46:23.86 0.3 undecidable manual P 296 0.1205 129 -0.04 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.6 5.8971465E-5 0.0592 AML other m 2019-03-17T02:46:25.65
IV.CESI.HHN. ML:0.4 3.391832E-5 0.1392 AML other m 2019-03-17T02:46:25.62
IV.ASSB.HHE. ML:0.5 2.9855366E-5 0.16 AML other m 2019-03-17T02:46:26.76
IV.ASSB.HHN. ML:0.5 3.4737615E-5 0.1008 AML other m 2019-03-17T02:46:26.41
IV.FDMO.HHE. ML:0.2 1.02435135E-5 0.1408 AML other m 2019-03-17T02:46:29.84
IV.FDMO.HHN. ML:0.4 1.2538855E-5 0.16 AML other m 2019-03-17T02:46:30.49
IV.MOMA.HHE. ML:0.7 2.4408355E-5 0.2 AML other m 2019-03-17T02:46:31.33
IV.MOMA.HHN. ML:0.7 2.265548E-5 0.1408 AML other m 2019-03-17T02:46:31.29
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
Waveforms Seismic signals in full SEED format Download