Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 24-02-2021 and time 08:53:00 (UTC) in region 2 km SW Trevi (PG)

A magnitude ML 0.9 earthquake occured in region: 2 km SW Trevi (PG), on

  • 24-02-2021 08:53:00 (UTC)
  • 24-02-2021 09:53:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8590, 12.7370 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
Trevi PG 2 8469 8469
Campello sul Clitunno PG 5 2442 10911
Castel Ritaldi PG 7 3278 14189
Montefalco PG 8 5679 19868
Foligno PG 11 57155 77023
Giano dell'Umbria PG 13 3846 80869
Bevagna PG 13 5081 85950
Spoleto PG 14 38218 124168
Vallo di Nera PG 14 364 124532
Cerreto di Spoleto PG 15 1075 125607
Gualdo Cattaneo PG 16 6155 131762
Spello PG 16 8645 140407
Sellano PG 16 1079 141486
Sant'Anatolia di Narco PG 16 564 142050
Scheggino PG 18 461 142511
Massa Martana PG 20 3770 146281
Cannara PG 20 4305 150586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Foligno (57155 inhabitants)
34 Km N of Terni (111501 inhabitants)
40 Km SE of Perugia (166134 inhabitants)
71 Km NE of Viterbo (67173 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
100 Km N of Tivoli (56533 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 2021-02-24
08:53:00		 42.8592 12.7368 10 2021-02-24
09:00:09		 Sala Sismica INGV-Roma 87439571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-24 08:53:00 ± 0.03
Latitude 42.8592 ± 0.0018
Longitude 12.7368 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87439571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 210
Semi-minor axis of confidence ellipse (meter) 158
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 245
Circular confidence region, given by single value of horizontal uncertainty (meter) 210.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33994
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 6
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 87439571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-24 09:00:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.MUGIO.HHZ. 2021-02-24T08:54:30.14 3.0 undecidable manual Sn 4.23 0
RF.GEPF.HHZ. 2021-02-24T08:54:21.92 3.0 undecidable manual Sn 0.03 0
AC.VLO.HHZ. 2021-02-24T08:54:20.10 3.0 negative manual Pg 13.14 0
IV.ECTS.HHZ. 2021-02-24T08:54:16.12 3.0 undecidable manual Pg 18.6 0
IV.GIZZ.HHZ. 2021-02-24T08:54:05.08 3.0 positive manual Pg 13.67 0
IV.NDIM.HHZ. 2021-02-24T08:54:03.87 3.0 undecidable manual Sg 11.19 0
MN.PDG.HHZ. 2021-02-24T08:53:56.59 3.0 negative manual Pn -1.53 0
IV.USI.HHZ. 2021-02-24T08:53:55.30 3.0 undecidable manual Pg 14.65 0
IV.PLLN.EHZ. 2021-02-24T08:53:52.67 3.0 positive manual Pn 0.39 0
RD.PGF.BHZ. 2021-02-24T08:53:51.64 3.0 undecidable manual Sn 2.08 0
IV.VVLD.HHZ. 2021-02-24T08:53:43.55 3.0 undecidable manual Sg 7.87 0
IV.ZONE.HHZ. 2021-02-24T08:53:35.08 3.0 undecidable manual Pn 2.99 0
IV.MTMR.EHZ. 2021-02-24T08:53:21.28 3.0 positive manual Pn -4.33 0
IV.GIUL.HHZ. 2021-02-24T08:53:19.61 3.0 positive manual Pg 9.34 0
IV.LNSS.HHE. 2021-02-24T08:53:13.36 0.3 undecidable manual S 139 37.7289 50 0.12 74
IV.ATCC.HNE. 2021-02-24T08:53:13.04 0.3 undecidable manual S 348 37.0296 50 -0.01 76
IV.MML1.HNZ. 2021-02-24T08:53:12.24 0.6 undecidable manual S 34 34.0437 50 -0.02 51
IV.EL6.EHZ. 2021-02-24T08:53:11.41 3.0 negative manual Pg 4.48 0
IV.CESX.HHZ. 2021-02-24T08:53:11.24 3.0 undecidable manual S 0
IV.VVLD.HHZ. 2021-02-24T08:53:10.12 3.0 undecidable manual Pn -0.14 0
IV.CSP1.EHZ. 2021-02-24T08:53:09.29 3.0 positive manual Pn 2.82 0
IV.CESI.HHZ. 2021-02-24T08:53:08.63 0.6 undecidable manual S 40 21.1677 115 0.03 52
IV.GAVE.EHZ. 2021-02-24T08:53:08.95 0.3 undecidable manual S 145 22.5552 114 -0.09 76
IV.ATCC.HNE. 2021-02-24T08:53:07.81 0.1 undecidable manual P 348 37.0296 50 0.07 100
IV.MML1.HNZ. 2021-02-24T08:53:07.14 0.1 undecidable manual P 34 34.0437 50 -0.14 99
IV.APEC.HHZ. 2021-02-24T08:53:07.86 3.0 negative manual Pn 1.71 0
IV.LNSS.HHE. 2021-02-24T08:53:07.80 0.1 undecidable manual P 139 37.7289 50 -0.05 100
IV.MOMA.HHZ. 2021-02-24T08:53:06.70 0.6 undecidable manual S 246 14.874 124 -0.02 52
IV.RIBO.EHZ.01 2021-02-24T08:53:06.63 3.0 undecidable manual P 1.8 0
IV.NRCA.HHZ. 2021-02-24T08:53:06.78 3.0 negative manual Pn 1.31 0
IV.GAVE.EHZ. 2021-02-24T08:53:05.60 1.0 undecidable manual P 145 22.5552 114 0.17 25
IV.CESI.HHZ. 2021-02-24T08:53:05.27 0.3 positive manual P 40 21.1677 115 0.09 76
IV.MOMA.HHZ. 2021-02-24T08:53:04.09 0.3 negative manual P 246 14.874 124 0.01 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.0 0.0001065 0.22 AML other m 2021-02-24T08:53:07.22
IV.MOMA.HHE. ML:1.1 0.000122 1.02 AML other m 2021-02-24T08:53:07.76
IV.CESI.HHE. ML:0.6 0.000027137127000000002 0.2432 AML other m 2021-02-24T08:53:10.73
IV.CESI.HHN. ML:0.8 0.000039582455 0.16 AML other m 2021-02-24T08:53:08.90
IV.GAVE.EHE. ML:1.1 0.0000736637335 0.1216 AML other m 2021-02-24T08:53:09.62
IV.GAVE.EHN. ML:1.0 0.000071052255 0.1216 AML other m 2021-02-24T08:53:10.03
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