Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 19-05-2021 and time 01:23:37 (UTC) in region 4 km SE Sellano (PG)

A magnitude ML 0.9 earthquake occured in region: 4 km SE Sellano (PG), on

  • 19-05-2021 01:23:37 (UTC)
  • 19-05-2021 03:23:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8610, 12.9670 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.

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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 5 1079 1079
Cerreto di Spoleto PG 6 1075 2154
Preci PG 6 724 2878
Visso MC 13 1107 3985
Norcia PG 13 4957 8942
Vallo di Nera PG 13 364 9306
Monte Cavallo MC 15 145 9451
Castelsantangelo sul Nera MC 16 281 9732
Campello sul Clitunno PG 16 2442 12174
Cascia PG 16 3217 15391
Poggiodomo PG 17 117 15508
Ussita MC 17 444 15952
Sant'Anatolia di Narco PG 18 564 16516
Trevi PG 18 8469 24985
Scheggino PG 20 461 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
54 Km SE of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
98 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.9 2021-05-19
01:23:37		 42.8613 12.9672 11 2021-05-19
02:14:39		 Sala Sismica INGV-Roma 90244861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-19 01:23:37 ± 0.08
Latitude 42.8613 ± 0.0027
Longitude 12.9672 ± 0.0061
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90244861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 396
Semi-minor axis of confidence ellipse (meter) 264
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26620
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 90244861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-19 02:14:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-05-19T01:23:47.90 0.3 undecidable manual S 82 29.5482 50 -0.08 72
IV.FDMO.HHZ. 2021-05-19T01:23:45.65 0.3 undecidable manual S 27 21.7671 116 -0.23 71
IV.GAVE.EHZ. 2021-05-19T01:23:45.04 0.3 undecidable manual S 198 19.6692 118 -0.2 71
IV.CESI.HHZ. 2021-05-19T01:23:44.24 0.3 undecidable manual S 342 16.6722 122 -0.11 73
IV.NRCA.HHZ. 2021-05-19T01:23:43.15 0.1 undecidable manual S 104 12.3765 130 0.02 100
IV.MMO1.EHZ. 2021-05-19T01:23:43.56 0.1 undecidable manual P 82 29.5482 50 0.01 97
IV.MC2.EHZ. 2021-05-19T01:23:42.10 3.0 negative manual P 0.21 0
IV.FDMO.HHZ. 2021-05-19T01:23:42.34 0.6 positive manual P 27 21.7671 116 0 49
IV.GAVE.EHZ. 2021-05-19T01:23:41.99 0.1 undecidable manual P 198 19.6692 118 0.02 99
IV.CESI.HHZ. 2021-05-19T01:23:41.71 0.1 undecidable manual P 342 16.6722 122 0.25 95
IV.NRCA.HHZ. 2021-05-19T01:23:40.92 0.1 undecidable manual P 104 12.3765 130 0.17 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.3 0.00019350000000000001 0.14 AML other m 2021-05-19T01:23:43.27
IV.NRCA.HHE. ML:0.8 0.00007575000000000001 0.08 AML other m 2021-05-19T01:23:43.32
IV.GAVE.EHN. ML:0.9 0.0000584 0.1 AML other m 2021-05-19T01:23:45.71
IV.GAVE.EHE. ML:0.9 0.0000634 0.16 AML other m 2021-05-19T01:23:45.87
IV.FDMO.HHN. ML:0.7 0.00003535 0.1 AML other m 2021-05-19T01:23:45.89
IV.FDMO.HHE. ML:0.7 0.000037250000000000004 0.42 AML other m 2021-05-19T01:23:46.18
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download