Earthquake with magnitude of ML 1.8 on date 25-07-2021 and time 00:51:55 (Italy) in region 4 km NE Spoleto (PG)

A magnitude ML 1.8 earthquake occured in region: 4 km NE Spoleto (PG), on

  • 24-07-2021 22:51:55 (UTC)
  • 25-07-2021 00:51:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.77, 12.754 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.

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
Campello sul Clitunno PG 6 2442 40660
Sant'Anatolia di Narco PG 8 564 41224
Scheggino PG 9 461 41685
Castel Ritaldi PG 9 3278 44963
Vallo di Nera PG 9 364 45327
Trevi PG 12 8469 53796
Cerreto di Spoleto PG 15 1075 54871
Giano dell'Umbria PG 16 3846 58717
Montefalco PG 16 5679 64396
Poggiodomo PG 16 117 64513
Ferentillo TR 17 1913 66426
Massa Martana PG 19 3770 70196
Acquasparta TR 19 4778 74974
Montefranco TR 19 1276 76250
Sellano PG 20 1079 77329

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Foligno (57155 inhabitants)
25 Km NE of Terni (111501 inhabitants)
48 Km SE of Perugia (166134 inhabitants)
66 Km NE of Viterbo (67173 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
79 Km W of Teramo (54892 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
100 Km N of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.8 2021-07-24
22:51:55
42.7698 12.7538 10 2021-07-24
23:03:23
Sala Sismica INGV-Roma 93171201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-24 22:51:55 ± 0.04
Latitude 42.7698 ± 0.0027
Longitude 12.7538 ± 0.0049
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 93171201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 375
Semi-minor axis of confidence ellipse (meter) 220
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 33
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
Epicentral distance of station farthest from the epicenter (degree) 0.51621
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 19
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 58
Type of magnitude ML
Reference to an origin 93171201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-24 23:03:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SEI.HHZ. 2021-07-24T22:52:46.61 3.0 undecidable manual Sn 0.46 0
IV.RNI2.HHZ. 2021-07-24T22:52:45.33 3.0 undecidable manual S 2.95 0
IV.PIEI.HHZ. 2021-07-24T22:52:23.29 3.0 undecidable manual S 0.16 0
IV.ARVD.HHZ. 2021-07-24T22:52:21.80 3.0 undecidable manual S 0.07 0
IV.ATMI.HHZ. 2021-07-24T22:52:19.40 3.0 undecidable manual S 0.04 0
IV.EL6.EHZ. 2021-07-24T22:52:17.56 3.0 undecidable manual S 0 0
IV.MURB.HHZ. 2021-07-24T22:52:14.40 3.0 undecidable manual S -0.12 0
IV.CAFI.HHZ. 2021-07-24T22:52:11.25 3.0 negative manual P -0.11 0
IV.SMA1.EHZ. 2021-07-24T22:52:11.83 3.0 undecidable manual S 108 0.4488 50 0.5 0
IV.PIEI.HHZ. 2021-07-24T22:52:10.69 3.0 negative manual P -0.26 0
IV.ATCC.EHZ. 2021-07-24T22:52:10.95 0.3 undecidable manual S 349 0.4236 50 0.39 66
IV.RM33.EHZ. 2021-07-24T22:52:10.92 0.6 undecidable manual S 127 0.4272 50 0.23 46
IV.CING.HHZ. 2021-07-24T22:52:09.36 3.0 negative manual P 0.22 0
IV.MML1.EHZ. 2021-07-24T22:52:09.60 0.6 undecidable manual S 25 0.3786 50 0.36 45
IV.MC2.EHZ. 2021-07-24T22:52:08.72 0.6 undecidable manual S 66 0.3489 50 0.36 45
IV.FDMO.HHZ. 2021-07-24T22:52:08.87 0.6 undecidable manual S 42 0.3615 50 0.14 47
IV.MF5.EHZ. 2021-07-24T22:52:07.24 3.0 positive manual P 0.42 0
IV.FIAM.HHZ. 2021-07-24T22:52:06.65 3.0 undecidable manual P -0.28 0
IV.SACS.HHZ. 2021-07-24T22:52:06.30 3.0 undecidable manual P -1.78 0
IV.ASSB.HHZ. 2021-07-24T22:52:06.27 0.6 undecidable manual S 346 0.2815 50 -0.09 48
IV.GUMA.HHZ. 2021-07-24T22:52:06.16 0.6 positive manual P 55 0.5162 50 0.43 43
IV.CESI.HHZ. 2021-07-24T22:52:05.45 0.6 undecidable manual S 25 0.2599 50 -0.26 47
IV.FOSV.EHZ. 2021-07-24T22:52:05.59 3.0 undecidable manual P -0.58 0
IV.NRCA.HHZ. 2021-07-24T22:52:05.84 0.6 undecidable manual S 76 0.2716 50 -0.23 47
IV.LNSS.HHZ. 2021-07-24T22:52:05.78 0.6 undecidable manual S 128 0.2689 50 -0.2 47
IV.MGAB.HHZ. 2021-07-24T22:52:05.45 3.0 negative manual P -0.16 0
IV.CSP1.EHZ. 2021-07-24T22:52:04.79 1.0 negative manual P 46 0.4605 50 0.02 24
IV.RM33.EHZ. 2021-07-24T22:52:04.11 0.3 negative manual P 127 0.4272 50 -0.09 70
IV.ATCC.EHZ. 2021-07-24T22:52:04.14 0.3 negative manual P 349 0.4236 50 0.01 72
IV.SMA1.EHZ. 2021-07-24T22:52:04.71 0.3 negative manual P 108 0.4488 50 0.14 69
IV.MML1.EHZ. 2021-07-24T22:52:03.19 1.0 negative manual P 25 0.3786 50 -0.18 23
IT.FOPC.HGE. 2021-07-24T22:52:03.85 0.6 undecidable manual S 349 0.2032 114 -0.05 49
IV.ARRO.EHZ. 2021-07-24T22:52:03.71 0.6 undecidable manual S 177 0.1907 115 0.24 48
IV.CESX.HHZ. 2021-07-24T22:52:03.78 0.6 undecidable manual S 217 0.2023 114 -0.1 49
IV.MC2.EHZ. 2021-07-24T22:52:02.86 0.3 negative manual P 66 0.3489 50 0 73
IV.FEMA.HNN. 2021-07-24T22:52:02.12 0.6 undecidable manual P 48 0.2896 50 0.28 46
IV.FDMO.HHZ. 2021-07-24T22:52:02.97 0.6 negative manual P 42 0.3615 50 -0.1 47
IV.LNSS.HHZ. 2021-07-24T22:52:01.29 0.1 undecidable manual P 128 0.2689 50 -0.19 95
IV.GAVE.EHZ. 2021-07-24T22:52:01.36 0.6 undecidable manual S 127 0.1286 125 -0.04 50
IV.ASSB.HHZ. 2021-07-24T22:52:01.54 0.1 negative manual P 346 0.2815 50 -0.16 95
IT.MTCL.HGN. 2021-07-24T22:52:01.60 0.1 undecidable manual P 39 0.2869 50 -0.2 94
IV.MOMA.HHZ. 2021-07-24T22:52:01.63 0.6 undecidable manual S 284 0.1394 123 -0.09 50
IV.CESI.HHZ. 2021-07-24T22:52:01.22 0.1 negative manual P 25 0.2599 50 -0.11 97
IV.NRCA.HHZ. 2021-07-24T22:52:01.35 0.1 negative manual P 76 0.2716 50 -0.19 95
IV.ARRO.EHZ. 2021-07-24T22:52:00.20 1.0 positive manual P 177 0.1907 115 0.17 24
IV.CESX.HHZ. 2021-07-24T22:52:00.37 0.6 negative manual P 217 0.2023 114 0.1 49
IT.FOPC.HGE. 2021-07-24T22:52:00.23 0.1 undecidable manual P 349 0.2032 114 -0.05 99
IV.MOMA.HHZ. 2021-07-24T22:51:59.12 0.1 negative manual P 284 0.1394 123 0.09 99
IV.GAVE.EHZ. 2021-07-24T22:51:58.91 0.1 negative manual P 127 0.1286 125 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:2.3 0.001945 0.44 AML other m 2021-07-24T22:52:01.69
IV.GAVE.HNE. ML:2.3 0.00183 0.18 AML other m 2021-07-24T22:52:01.69
IV.MOMA.HHN. ML:1.9 0.000711 1.58 AML other m 2021-07-24T22:52:02.93
IV.MOMA.HNN. ML:1.9 0.000699 0.16 AML other m 2021-07-24T22:52:02.22
IV.MOMA.HNE. ML:2.4 0.002265 0.22 AML other m 2021-07-24T22:52:02.31
IV.MOMA.HHE. ML:2.4 0.00239 0.2 AML other m 2021-07-24T22:52:02.31
IV.GAVE.HNN. ML:1.7 0.000523 0.24 AML other m 2021-07-24T22:52:02.33
IV.GAVE.EHN. ML:2.2 0.001575 0.16 AML other m 2021-07-24T22:52:02.22
IV.ARRO.EHN. ML:1.7 0.000328 0.62 AML other m 2021-07-24T22:52:04.16
IV.ARRO.EHE. ML:1.8 0.000482 0.24 AML other m 2021-07-24T22:52:04.31
IV.CESX.HHN. ML:2 0.000617 0.54 AML other m 2021-07-24T22:52:04.52
IV.CESX.HHE. ML:2 0.000598 0.32 AML other m 2021-07-24T22:52:05.52
IV.CESI.HHE. ML:1.8 0.000282 0.34 AML other m 2021-07-24T22:52:05.84
IV.CESI.HHN. ML:2 0.0004775 1.2 AML other m 2021-07-24T22:52:05.76
IV.LNSS.HHE. ML:2.3 0.001016 1 AML other m 2021-07-24T22:52:06.00
IV.NRCA.HHN. ML:2 0.0004725 0.98 AML other m 2021-07-24T22:52:06.87
IV.LNSS.HHN. ML:2.3 0.000908 0.24 AML other m 2021-07-24T22:52:06.61
IV.ASSB.HHE. ML:1.9 0.000334 0.2 AML other m 2021-07-24T22:52:06.69
IV.ASSB.HHN. ML:1.9 0.0003885 0.14 AML other m 2021-07-24T22:52:06.77
IV.NRCA.HHE. ML:2 0.00047700135 0.0896 AML other m 2021-07-24T22:52:07.74
IV.FDMO.HHE. ML:1.7 0.0001745 0.14 AML other m 2021-07-24T22:52:09.20
IV.FDMO.HHN. ML:1.6 0.0001395 0.26 AML other m 2021-07-24T22:52:09.76
IV.ATCC.EHN. ML:1.7 0.000157 0.14 AML other m 2021-07-24T22:52:11.91
IV.ATCC.EHE. ML:2 0.000281 1.16 AML other m 2021-07-24T22:52:12.96
IV.RM33.EHN. ML:2 0.0002595 0.26 AML other m 2021-07-24T22:52:12.52
IV.RM33.EHE. ML:1.9 0.0002435 0.88 AML other m 2021-07-24T22:52:12.75
IV.CSP1.EHE. ML:2 0.000239 0.98 AML other m 2021-07-24T22:52:13.60
IV.CSP1.EHN. ML:2.1 0.00032 0.22 AML other m 2021-07-24T22:52:13.21
IV.SMA1.EHN. ML:2 0.000272 0.32 AML other m 2021-07-24T22:52:14.20
IV.MML1.EHN. ML:1.5 0.00010515 0.26 AML other m 2021-07-24T22:52:14.25
IV.GUMA.HHE. ML:2 0.000234 0.22 AML other m 2021-07-24T22:52:14.50
IV.SMA1.EHE. ML:2.1 0.0003265 0.24 AML other m 2021-07-24T22:52:14.59
IV.FOSV.EHN. ML:1.5 6.865E-5 0.46 AML other m 2021-07-24T22:52:15.07
IV.MGAB.HHE. ML:1.6 9.875E-5 0.38 AML other m 2021-07-24T22:52:15.16
IV.MML1.EHE. ML:1.6 0.00013 0.7 AML other m 2021-07-24T22:52:15.56
IV.FIAM.HHE. ML:1.3 3.42E-5 1.24 AML other m 2021-07-24T22:52:16.07
IV.FOSV.EHE. ML:1.5 6.475E-5 0.52 AML other m 2021-07-24T22:52:16.31
IV.GUMA.HHN. ML:1.9 0.00017 0.32 AML other m 2021-07-24T22:52:17.37
IV.MGAB.HHN. ML:1.8 0.0001355 0.4 AML other m 2021-07-24T22:52:18.39
IV.FIAM.HHN. ML:1.4 4.605E-5 1.52 AML other m 2021-07-24T22:52:18.21
IV.CING.HHE. ML:1.3 3.025E-5 0.82 AML other m 2021-07-24T22:52:21.61
IV.CING.HHN. ML:1.4 3.97E-5 1 AML other m 2021-07-24T22:52:23.32
IV.PIEI.HHN. ML:1.6 5.235E-5 0.34 AML other m 2021-07-24T22:52:24.35
IV.PIEI.HHE. ML:1.6 5.43E-5 0.26 AML other m 2021-07-24T22:52:24.65
IV.CAFI.HHN. ML:1.3 2.46E-5 0.98 AML other m 2021-07-24T22:52:24.98
IV.CAFI.HHE. ML:1.3 2.63E-5 1.12 AML other m 2021-07-24T22:52:25.24
IV.ARVD.HHN. ML:1 1.735E-5 0.84 AML other m 2021-07-24T22:52:27.90
IV.ARVD.HHE. ML:1.3 2.45E-5 0.88 AML other m 2021-07-24T22:52:32.63
IV.CESI.HNE. ML:1.7 0.0002647304 0.3072 AML other m 2021-07-24T22:52:08.47
IV.CESI.HNN. ML:1.9 0.0004303114 0.1792 AML other m 2021-07-24T22:52:05.75
IV.LNSS.HNE. ML:2.2 0.00083941135 0.1536 AML other m 2021-07-24T22:52:06.00
IV.LNSS.HNN. ML:2.2 0.0007620495 0.2432 AML other m 2021-07-24T22:52:06.61
IV.NRCA.HNE. ML:2 0.00043574675 0.192 AML other m 2021-07-24T22:52:07.13
IV.NRCA.HNN. ML:1.9 0.00038012825 0.1408 AML other m 2021-07-24T22:52:06.87
IV.MML1.HNE. ML:1.8 0.00018417575 0.4352 AML other m 2021-07-24T22:52:15.55
IV.MML1.HNN. ML:1.5 9.7256465E-5 0.2432 AML other m 2021-07-24T22:52:14.37
IV.RM33.HNE. ML:1.9 0.0002240233 0.1792 AML other m 2021-07-24T22:52:12.84
IV.RM33.HNN. ML:2 0.0002960046 0.256 AML other m 2021-07-24T22:52:12.52
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