Earthquake with magnitude of ML 1.1 on date 23-05-2021 and time 16:58:13 (UTC) in region 3 km S Cascia (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km S Cascia (PG), on

  • 23-05-2021 16:58:13 (UTC)
  • 23-05-2021 18:58:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6890, 13.0040 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.

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 4 3217 3217
Monteleone di Spoleto PG 6 599 3816
Poggiodomo PG 6 117 3933
Norcia PG 14 4957 8890
Scheggino PG 14 461 9351
Leonessa RI 14 2435 11786
Sant'Anatolia di Narco PG 15 564 12350
Vallo di Nera PG 15 364 12714
Cittareale RI 15 482 13196
Cerreto di Spoleto PG 16 1075 14271
Polino TR 17 233 14504
Ferentillo TR 19 1913 16417
Posta RI 20 694 17111

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Terni (111501 inhabitants)
39 Km SE of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
57 Km W of Teramo (54892 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
80 Km E of Viterbo (67173 inhabitants)
80 Km N of Guidonia Montecelio (88673 inhabitants)
82 Km N of Tivoli (56533 inhabitants)
96 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
Reviewed
Rev100
ML 1.1 2021-05-23
16:58:13
42.689 13.0042 11 2021-05-23
17:07:28
Sala Sismica INGV-Roma 90420771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-23 16:58:13 ± 0.06
Latitude 42.6890 ± 0.0054
Longitude 13.0042 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90420771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 681
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 221
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25990
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 90420771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-23 17:07:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PE3.EHZ. 2021-05-23T16:58:47.89 3.0 undecidable manual S -0.2 0
IV.SMA1.EHZ. 2021-05-23T16:58:24.00 0.6 undecidable manual S 103 27.75 50 0.12 48
IV.RM33.EHZ. 2021-05-23T16:58:23.34 0.6 undecidable manual S 139 26.3514 50 -0.16 48
IV.MC2.EHZ. 2021-05-23T16:58:19.66 0.6 undecidable manual P 31 28.8489 50 -0.17 47
IV.SMA1.EHZ. 2021-05-23T16:58:19.71 0.3 undecidable manual P 103 27.75 50 0.05 73
IV.RM33.EHZ. 2021-05-23T16:58:19.36 1.0 undecidable manual P 139 26.3514 50 -0.08 24
IV.ARRO.EHZ. 2021-05-23T16:58:18.99 0.6 positive manual P 238 22.9548 50 0.07 49
IV.GAVE.EHZ. 2021-05-23T16:58:18.55 0.6 undecidable manual S 272 8.9799 140 -0.15 49
IV.LNSS.HHZ. 2021-05-23T16:58:18.78 0.6 undecidable manual S 163 9.9789 137 -0.16 49
IV.LNSS.HHZ. 2021-05-23T16:58:16.95 0.1 undecidable manual P 163 9.9789 137 0.14 99
IV.GAVE.EHZ. 2021-05-23T16:58:16.75 0.1 positive manual P 272 8.9799 140 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.4 0.00036178925000000003 0.1792 AML other m 2021-05-23T16:58:18.58
IV.GAVE.EHN. ML:1.4 0.00035864839999999996 0.2176 AML other m 2021-05-23T16:58:19.28
IV.LNSS.HHE. ML:1.0 0.00011149999999999999 1.38 AML other m 2021-05-23T16:58:18.94
IV.LNSS.HHN. ML:1.0 0.00011438171 0.1664 AML other m 2021-05-23T16:58:19.30
IV.GAVE.HNE. ML:1.4 0.0003706871 0.192 AML other m 2021-05-23T16:58:18.67
IV.GAVE.HNN. ML:1.0 0.00012413849 0.2048 AML other m 2021-05-23T16:58:19.18
IV.LNSS.HNE. ML:0.9 0.00009971904500000001 0.1408 AML other m 2021-05-23T16:58:18.95
IV.LNSS.HNN. ML:1.0 0.000135571515 0.4864 AML other m 2021-05-23T16:58:17.91
IV.RM33.EHE. ML:0.7 0.000025118169999999997 0.2816 AML other m 2021-05-23T16:58:23.73
IV.RM33.EHN. ML:0.6 0.000018871164999999997 0.2304 AML other m 2021-05-23T16:58:24.12
IV.RM33.HNE. ML:1.2 0.000093068925 0.9088 AML other m 2021-05-23T16:58:27.96
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download