Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 19-03-2021 and time 01:55:28 (UTC) in region 2 km NW Monteleone di Spoleto (PG)

A magnitude ML 0.8 earthquake occured in region: 2 km NW Monteleone di Spoleto (PG), on

  • 19-03-2021 01:55:28 (UTC)
  • 19-03-2021 02:55:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6670, 12.9460 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.

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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
Monteleone di Spoleto PG 2 599 599
Poggiodomo PG 5 117 716
Cascia PG 8 3217 3933
Scheggino PG 11 461 4394
Sant'Anatolia di Narco PG 12 564 4958
Leonessa RI 12 2435 7393
Polino TR 12 233 7626
Vallo di Nera PG 13 364 7990
Ferentillo TR 14 1913 9903
Montefranco TR 17 1276 11179
Arrone TR 17 2763 13942
Cerreto di Spoleto PG 17 1075 15017
Morro Reatino RI 18 373 15390
Rivodutri RI 18 1253 16643
Cittareale RI 18 482 17125
Spoleto PG 19 38218 55343
Norcia PG 19 4957 60300
Poggio Bustone RI 19 2055 62355
Labro RI 20 374 62729

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Terni (111501 inhabitants)
38 Km SE of Foligno (57155 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
62 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
76 Km N of Guidonia Montecelio (88673 inhabitants)
79 Km N of Tivoli (56533 inhabitants)
94 Km NE of Roma (2864731 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 0.8 2021-03-19
01:55:28		 42.667 12.9455 11 2021-03-19
02:17:23		 Sala Sismica INGV-Roma 88265431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-19 01:55:28 ± 0.06
Latitude 42.6670 ± 0.0063
Longitude 12.9455 ± 0.0049
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 88265431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 730
Semi-minor axis of confidence ellipse (meter) 367
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 200
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.28868
Number of stations at which the event was observed 6
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 7
Type of magnitude ML
Reference to an origin 88265431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-19 02:17:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2021-03-19T01:55:40.10 0.1 undecidable manual S 97 32.0457 50 0.19 93
IV.RM33.EHZ. 2021-03-19T01:55:38.84 0.1 undecidable manual S 128 28.1496 50 -0.01 97
IV.T1299.HNZ. 2021-03-19T01:55:38.88 0.3 undecidable manual S 97 27.75 50 0.14 71
IV.SMA1.EHZ. 2021-03-19T01:55:35.07 0.1 undecidable manual P 97 32.0457 50 -0.17 93
IV.T1299.HNZ. 2021-03-19T01:55:34.40 0.1 undecidable manual P 97 27.75 50 -0.17 94
IV.LNSS.HHZ. 2021-03-19T01:55:34.13 0.1 undecidable manual S 133 10.4784 136 0 100
IV.RM33.EHZ. 2021-03-19T01:55:34.47 0.1 undecidable manual P 128 28.1496 50 -0.16 94
IV.ARRO.EHZ. 2021-03-19T01:55:33.10 0.1 undecidable manual P 236 17.6712 50 0.09 97
IV.GAVE.EHZ. 2021-03-19T01:55:32.98 0.1 undecidable manual S 304 4.995 155 -0.06 100
IV.GAVE.EHZ. 2021-03-19T01:55:31.39 0.1 positive manual P 304 4.995 155 0.12 99
IV.LNSS.HHZ. 2021-03-19T01:55:31.96 0.1 undecidable manual P 133 10.4784 136 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:0.8 0.0001067 0.54 AML other m 2021-03-19T01:55:33.35
IV.GAVE.EHN. ML:1.0 0.0001385 0.7 AML other m 2021-03-19T01:55:33.18
IV.LNSS.HHE. ML:1.0 0.0001195 0.26 AML other m 2021-03-19T01:55:34.40
IV.LNSS.HHN. ML:0.9 0.0000982 0.16 AML other m 2021-03-19T01:55:34.80
IV.GAVE.HNE. ML:0.9 0.00012247924785 0.1392 AML other m 2021-03-19T01:55:33.35
IV.RM33.EHE. ML:0.6 0.000021669260000000003 0.5408 AML other m 2021-03-19T01:55:39.42
IV.RM33.EHN. ML:0.6 0.00001813064 0.84 AML other m 2021-03-19T01:55:39.48
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