Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 19-02-2021 and time 05:29:56 (UTC) in region 2 km NE Spoleto (PG)

A magnitude ML 1.4 earthquake occured in region: 2 km NE Spoleto (PG), on

  • 19-02-2021 05:29:56 (UTC)
  • 19-02-2021 06:29:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7480, 12.7570 at 8 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
Spoleto PG 2 38218 38218
Sant'Anatolia di Narco PG 7 564 38782
Scheggino PG 7 461 39243
Campello sul Clitunno PG 8 2442 41685
Vallo di Nera PG 9 364 42049
Castel Ritaldi PG 11 3278 45327
Ferentillo TR 14 1913 47240
Trevi PG 15 8469 55709
Poggiodomo PG 15 117 55826
Cerreto di Spoleto PG 15 1075 56901
Montefranco TR 17 1276 58177
Giano dell'Umbria PG 18 3846 62023
Acquasparta TR 18 4778 66801
Arrone TR 18 2763 69564
Montefalco PG 18 5679 75243
Monteleone di Spoleto PG 19 599 75842
Massa Martana PG 19 3770 79612
Polino TR 19 233 79845

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Terni (111501 inhabitants)
24 Km S of Foligno (57155 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
87 Km N of Tivoli (56533 inhabitants)
98 Km N 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 1.4 2021-02-19
05:29:56		 42.748 12.7573 9 2021-02-19
05:41:38		 Sala Sismica INGV-Roma 87290631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-19 05:29:56 ± 0.05
Latitude 42.7480 ± 0.0027
Longitude 12.7573 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87290631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 297
Semi-minor axis of confidence ellipse (meter) 247
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 232
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
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) 0.11511
Epicentral distance of station farthest from the epicenter (degree) 0.63402
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 87290631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-19 05:41:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-02-19T05:30:18.20 0.3 undecidable manual S 101 70.374 50 -0.13 67
IV.CSP1.EHZ. 2021-02-19T05:30:14.08 0.6 undecidable manual S 43 52.7028 50 0.48 43
IV.SMA1.EHZ. 2021-02-19T05:30:13.20 0.6 undecidable manual S 105 48.9177 50 0.61 41
IV.MMO1.EHZ. 2021-02-19T05:30:12.81 0.6 undecidable manual S 70 49.3173 50 0.12 47
IV.RM33.EHZ. 2021-02-19T05:30:11.77 0.3 undecidable manual S 125 45.8208 50 0.02 72
IV.FDMO.HHZ. 2021-02-19T05:30:10.63 0.3 undecidable manual S 40 41.7249 50 -0.05 72
IV.MC2.EHZ. 2021-02-19T05:30:10.06 0.6 undecidable manual S 63 39.5271 50 -0.02 48
IV.TERO.HHZ. 2021-02-19T05:30:08.94 0.6 undecidable manual P 101 70.374 50 -0.16 44
IV.ASSB.HHZ. 2021-02-19T05:30:08.43 0.3 undecidable manual S 346 33.6441 50 -0.09 72
IV.CESI.HHZ. 2021-02-19T05:30:07.55 0.3 undecidable manual S 23 30.9468 105 -0.06 73
IV.LNSS.HHZ. 2021-02-19T05:30:06.40 0.6 undecidable manual S 125 28.1496 107 -0.29 47
IV.CSP1.EHZ. 2021-02-19T05:30:06.47 0.6 positive manual P 43 52.7028 50 0.1 46
IV.MMO1.EHZ. 2021-02-19T05:30:05.64 0.3 positive manual P 70 49.3173 50 -0.2 69
IV.SMA1.EHZ. 2021-02-19T05:30:05.75 0.3 negative manual P 105 48.9177 50 -0.03 71
IV.RM33.EHZ. 2021-02-19T05:30:04.90 0.6 positive manual P 125 45.8208 50 -0.4 44
IV.MC2.EHZ. 2021-02-19T05:30:04.33 0.3 undecidable manual P 63 39.5271 50 -0.01 73
IV.FDMO.HHZ. 2021-02-19T05:30:04.69 1.0 positive manual P 40 41.7249 50 0.01 24
IV.CESX.HHZ. 2021-02-19T05:30:03.97 0.6 undecidable manual S 222 20.7681 112 -0.31 47
IV.ASSB.HHZ. 2021-02-19T05:30:03.45 0.1 negative manual P 346 33.6441 50 0.01 98
IV.MOMA.HHZ. 2021-02-19T05:30:03.05 0.3 undecidable manual S 292 16.4724 117 0.14 74
IV.ARRO.EHZ. 2021-02-19T05:30:03.92 0.3 undecidable manual S 178 18.7701 114 0.29 71
IV.CESI.HHZ. 2021-02-19T05:30:02.84 0.1 undecidable manual P 23 30.9468 105 -0.07 97
IV.LNSS.HHZ. 2021-02-19T05:30:02.17 0.1 positive manual P 125 28.1496 107 -0.21 95
IV.GAVE.EHZ. 2021-02-19T05:30:01.82 0.3 undecidable manual S 119 12.7761 123 0.02 76
IV.MOMA.HHZ. 2021-02-19T05:30:00.26 0.1 positive manual P 292 16.4724 117 0.06 100
IV.ARRO.EHZ. 2021-02-19T05:30:00.76 0.1 undecidable manual P 178 18.7701 114 0.15 98
IV.CESX.HHZ. 2021-02-19T05:30:00.79 0.6 negative manual P 222 20.7681 112 -0.2 48
IV.GAVE.EHZ. 2021-02-19T05:29:59.75 0.1 positive manual P 119 12.7761 123 0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.6 0.000537 0.4 AML other m 2021-02-19T05:30:02.66
IV.GAVE.EHN. ML:1.6 0.000521 0.18 AML other m 2021-02-19T05:30:03.22
IV.MOMA.HHN. ML:1.6 0.00038849999999999996 0.16 AML other m 2021-02-19T05:30:03.33
IV.ARRO.EHE. ML:1.3 0.00015550000000000004 0.88 AML other m 2021-02-19T05:30:03.97
IV.MOMA.HNN. ML:1.6 0.00039349999999999997 1.2 AML other m 2021-02-19T05:30:04.06
IV.MOMA.HHE. ML:1.6 0.0003595 0.14 AML other m 2021-02-19T05:30:04.82
IV.MOMA.HNE. ML:1.6 0.000352 0.12 AML other m 2021-02-19T05:30:04.83
IV.ARRO.EHN. ML:1.3 0.0001495 0.14 AML other m 2021-02-19T05:30:05.22
IV.CESX.HHN. ML:1.4 0.00020500000000000002 0.3 AML other m 2021-02-19T05:30:05.53
IV.CESX.HHE. ML:1.3 0.00013700000000000002 0.96 AML other m 2021-02-19T05:30:06.59
IV.LNSS.HHN. ML:1.5 0.0001635 0.76 AML other m 2021-02-19T05:30:07.56
IV.LNSS.HHE. ML:1.7 0.0002805 0.12 AML other m 2021-02-19T05:30:07.75
IV.CESI.HHN. ML:1.8 0.00026450000000000003 0.12 AML other m 2021-02-19T05:30:07.85
IV.CESI.HHE. ML:1.4 0.0001144 1.66 AML other m 2021-02-19T05:30:07.94
IV.ASSB.HHE. ML:1.2 0.0000595 0.44 AML other m 2021-02-19T05:30:09.70
IV.ASSB.HHN. ML:1.1 0.000055900000000000004 0.94 AML other m 2021-02-19T05:30:09.78
IV.FDMO.HHN. ML:1.2 0.000052000000000000004 1.16 AML other m 2021-02-19T05:30:10.89
IV.FDMO.HHE. ML:1.3 0.00006065 0.94 AML other m 2021-02-19T05:30:11.09
IV.RM33.EHN. ML:1.1 0.0000356 0.66 AML other m 2021-02-19T05:30:12.35
IV.RM33.EHE. ML:1.2 0.0000447 0.66 AML other m 2021-02-19T05:30:13.63
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