Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 25-07-2021 and time 03:51:03 (Italy) in region 5 km S Cascia (PG)

A magnitude ML 0.7 earthquake occured in region: 5 km S Cascia (PG), on

  • 25-07-2021 01:51:03 (UTC)
  • 25-07-2021 03:51:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6790, 13.0120 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Cascia PG 5 3217 3217
Monteleone di Spoleto PG 6 599 3816
Poggiodomo PG 7 117 3933
Leonessa RI 14 2435 6368
Cittareale RI 14 482 6850
Norcia PG 14 4957 11807
Scheggino PG 15 461 12268
Sant'Anatolia di Narco PG 16 564 12832
Vallo di Nera PG 16 364 13196
Polino TR 17 233 13429
Cerreto di Spoleto PG 18 1075 14504
Posta RI 19 694 15198
Ferentillo TR 19 1913 17111
Accumoli RI 19 667 17778

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Terni (111501 inhabitants)
40 Km SE of Foligno (57155 inhabitants)
48 Km NW of L'Aquila (69753 inhabitants)
57 Km W of Teramo (54892 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
79 Km NE of Guidonia Montecelio (88673 inhabitants)
80 Km E of Viterbo (67173 inhabitants)
81 Km N of Tivoli (56533 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
98 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
Bulletin
Rev1000 		ML 0.7 2021-07-25
01:51:03		 42.6787 13.0118 10 2021-12-29
11:12:15		 Bollettino Sismico Italiano INGV 93268301
Reviewed
Rev100 		ML 0.7 2021-07-25
01:51:03		 42.6813 13.018 9 2021-07-25
02:07:41		 Sala Sismica INGV-Roma 93176491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-25 01:51:03 ± 0.06
Latitude 42.6787 ± 0.0045
Longitude 13.0118 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93268301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 271
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 175
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 93268301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-27 12:37:29

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 93176491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-25 02:07:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2021-07-25T01:52:47.44 3.0 undecidable manual Sg 19.969999 0
CR.STON.BHZ. 2021-07-25T01:52:39.60 3.0 undecidable manual Sg 11.97 0
IV.PETRA.HHZ. 2021-07-25T01:52:10.52 3.0 undecidable manual Pn -1.85 0
IV.CMIS.HHZ. 2021-07-25T01:52:08.92 3.0 undecidable manual Sg 6.03 0
IV.CRJA.HHZ. 2021-07-25T01:52:02.13 3.0 undecidable manual Pn -9.77 0
IV.MSSA.HHZ. 2021-07-25T01:51:44.52 3.0 undecidable manual Pn 5.03 0
IV.NDIM.HHZ. 2021-07-25T01:51:38.29 3.0 negative manual Pg 4.78 0
IV.CESX.HHN. 2021-07-25T01:51:14.82 0.1 undecidable manual S 258 35.5422 50 -0.55 86
IV.MC2.EHZ. 2021-07-25T01:51:13.81 0.1 undecidable manual S 29 29.5482 50 0.03 98
IV.SMA1.EHZ. 2021-07-25T01:51:13.09 0.6 undecidable manual S 101 26.9508 50 0.02 49
IV.RM33.HNE. 2021-07-25T01:51:12.18 0.6 undecidable manual S 139 25.0527 112 -0.34 46
IV.T1299.EHE. 2021-07-25T01:51:11.68 0.1 undecidable manual S 102 22.5552 114 -0.05 99
IV.ARRO.EHZ. 2021-07-25T01:51:11.54 0.6 undecidable manual S 241 22.9548 113 -0.29 47
IV.MOMA.HNE. 2021-07-25T01:51:11.37 3.0 undecidable manual P 0.45 0
IV.CESX.HHN. 2021-07-25T01:51:10.61 0.1 undecidable manual P 258 35.5422 50 0.4 90
IV.NRCA.HHZ. 2021-07-25T01:51:10.28 0.1 undecidable manual S 26 19.0698 117 -0.36 93
IV.SMA1.EHZ. 2021-07-25T01:51:09.06 0.1 undecidable manual P 101 26.9508 50 0.18 95
IV.MC2.EHZ. 2021-07-25T01:51:09.28 0.1 undecidable manual P 29 29.5482 50 -0.01 98
IV.CESI.HNE. 2021-07-25T01:51:09.99 3.0 undecidable manual P -0.64 0
IV.RM33.HNE. 2021-07-25T01:51:08.51 0.1 undecidable manual P 139 25.0527 112 -0.05 98
IV.T1299.EHE. 2021-07-25T01:51:08.26 0.1 undecidable manual P 102 22.5552 114 0.15 97
IV.GAVE.EHZ. 2021-07-25T01:51:08.07 0.1 undecidable manual S 279 9.6792 136 0.09 100
IV.ARRO.EHZ. 2021-07-25T01:51:08.19 0.1 undecidable manual P 241 22.9548 113 0.02 99
IV.NRCA.HHZ. 2021-07-25T01:51:07.49 0.1 undecidable manual P 26 19.0698 117 0.01 100
IV.LNSS.HHZ. 2021-07-25T01:51:07.60 0.1 undecidable manual S 165 8.6802 139 -0.15 99
IV.GAVE.EHZ. 2021-07-25T01:51:06.25 0.1 undecidable manual P 279 9.6792 136 0.3 96
IV.LNSS.HHZ. 2021-07-25T01:51:06.04 0.1 undecidable manual P 165 8.6802 139 0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.0 0.00014526605 0.12 AML other m 2021-07-25T01:51:07.97
IV.LNSS.HHN. ML:0.9 0.0001182303 0.24 AML other m 2021-07-25T01:51:08.15
IV.GAVE.HNE. ML:1.0 0.00011777609499999999 0.1208 AML other m 2021-07-25T01:51:08.57
IV.GAVE.EHN. ML:0.5 0.0000466 0.24 AML other m 2021-07-25T01:51:09.28
IV.GAVE.EHE. ML:0.7 0.00006245 0.36 AML other m 2021-07-25T01:51:09.41
IV.NRCA.HHN. ML:0.7 0.000034500000000000005 1 AML other m 2021-07-25T01:51:10.63
IV.NRCA.HHE. ML:0.9 0.00006155 0.16 AML other m 2021-07-25T01:51:10.89
IV.ARRO.EHE. ML:0.4 0.000013949999999999999 0.64 AML other m 2021-07-25T01:51:11.49
IV.ARRO.EHN. ML:0.5 0.0000184 0.84 AML other m 2021-07-25T01:51:12.05
IV.SMA1.EHE. ML:0.7 0.00002965 0.5 AML other m 2021-07-25T01:51:13.44
IV.SMA1.EHN. ML:0.7 0.0000247 0.54 AML other m 2021-07-25T01:51:13.89
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