Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 25-03-2020 and time 02:02:43 (Italy) in region 4 km NW Spoleto (PG)

A magnitude ML 1.4 earthquake occured in region: 4 km NW Spoleto (PG), on

  • 25-03-2020 01:02:43 (UTC)
  • 25-03-2020 02:02:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7660, 12.7230 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
Spoleto PG 4 38218 38218
Castel Ritaldi PG 8 3278 41496
Campello sul Clitunno PG 8 2442 43938
Sant'Anatolia di Narco PG 10 564 44502
Scheggino PG 11 461 44963
Vallo di Nera PG 11 364 45327
Trevi PG 13 8469 53796
Giano dell'Umbria PG 14 3846 57642
Montefalco PG 15 5679 63321
Massa Martana PG 16 3770 67091
Acquasparta TR 17 4778 71869
Cerreto di Spoleto PG 17 1075 72944
Ferentillo TR 17 1913 74857
Poggiodomo PG 18 117 74974
Montefranco TR 19 1276 76250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Foligno (57155 inhabitants)
24 Km N of Terni (111501 inhabitants)
47 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km N of Tivoli (56533 inhabitants)
99 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 2020-03-25
01:02:43		 42.7662 12.7232 11 2020-03-25
01:06:39		 Sala Sismica INGV-Roma 77545141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-25 01:02:43 ± 0.07
Latitude 42.7662 ± 0.0036
Longitude 12.7232 ± 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 77545141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 534
Semi-minor axis of confidence ellipse (meter) 337
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.11871
Epicentral distance of station farthest from the epicenter (degree) 0.44337
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 77545141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-25 01:06:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2020-03-25T01:02:59.80 0.3 undecidable manual S 125 49.2174 50 0.2 70
IV.FDMO.HHZ. 2020-03-25T01:02:58.02 0.6 undecidable manual S 45 42.1245 50 0.31 46
IV.NRCA.HHZ. 2020-03-25T01:02:55.06 0.6 undecidable manual S 77 32.745 50 -0.13 49
IV.LNSS.HHZ. 2020-03-25T01:02:54.75 0.6 undecidable manual S 125 31.5462 50 -0.14 49
IV.CESI.HHZ. 2020-03-25T01:02:54.57 0.6 undecidable manual S 29 30.3474 50 0.02 50
IV.RM33.EHZ. 2020-03-25T01:02:52.90 0.1 undecidable manual P 125 49.2174 50 -0.08 96
IV.ARRO.EHZ. 2020-03-25T01:02:52.38 0.6 undecidable manual S 170 21.0678 50 0.3 48
IV.CESX.HHZ. 2020-03-25T01:02:51.87 0.6 undecidable manual S 212 20.7681 50 -0.13 50
IV.FDMO.HHZ. 2020-03-25T01:02:51.86 0.1 undecidable manual P 45 42.1245 50 -0.03 99
IV.CESI.HHZ. 2020-03-25T01:02:50.06 1.0 undecidable manual P 29 30.3474 50 -0.01 25
IV.LNSS.HHZ. 2020-03-25T01:02:50.14 0.1 undecidable manual P 125 31.5462 50 -0.12 98
IV.NRCA.HHZ. 2020-03-25T01:02:50.28 0.3 negative manual P 77 32.745 50 -0.16 73
IV.MOMA.HHZ. 2020-03-25T01:02:49.78 0.6 undecidable manual S 289 13.1757 129 -0.06 52
IV.CESX.HHZ. 2020-03-25T01:02:48.45 0.1 undecidable manual P 212 20.7681 50 -0.14 100
IV.ARRO.EHZ. 2020-03-25T01:02:48.96 0.6 positive manual P 170 21.0678 50 0.32 48
IV.MOMA.HHZ. 2020-03-25T01:02:47.52 0.3 positive manual P 289 13.1757 129 0.17 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.3 0.00020050000000000002 0.12 AML other m 2020-03-25T01:02:50.45
IV.MOMA.HHE. ML:1.5 0.00034899999999999997 0.18 AML other m 2020-03-25T01:02:50.47
IV.LNSS.HHN. ML:1.2 0.00006914999999999999 1.54 AML other m 2020-03-25T01:02:53.98
IV.NRCA.HHN. ML:1.4 0.00010115 0.58 AML other m 2020-03-25T01:02:55.98
IV.NRCA.HHE. ML:1.3 0.00008915000000000001 1.38 AML other m 2020-03-25T01:02:56.87
IV.LNSS.HHE. ML:1.4 0.0001106 0.64 AML other m 2020-03-25T01:02:58.83
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