Earthquake with magnitude of ML 1.2 on date 22-02-2021 and time 09:20:03 (UTC) in region 3 km SE Cascia (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km SE Cascia (PG), on

  • 22-02-2021 09:20:03 (UTC)
  • 22-02-2021 10:20:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7, 13.03 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
Cascia PG 3 3217 3217
Poggiodomo PG 8 117 3334
Monteleone di Spoleto PG 8 599 3933
Norcia PG 12 4957 8890
Cittareale RI 14 482 9372
Vallo di Nera PG 16 364 9736
Scheggino PG 16 461 10197
Sant'Anatolia di Narco PG 16 564 10761
Leonessa RI 16 2435 13196
Cerreto di Spoleto PG 16 1075 14271
Accumoli RI 18 667 14938
Polino TR 19 233 15171

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Terni (111501 inhabitants)
39 Km SE of Foligno (57155 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
56 Km W of Teramo (54892 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km E of Viterbo (67173 inhabitants)
84 Km N of Tivoli (56533 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
100 Km NE of Roma (2864731 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.2 2021-02-22
09:20:03
42.7 13.03 10 2021-02-22
09:28:30
Sala Sismica INGV-Roma 87375001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-22 09:20:03 ± 0.11
Latitude 42.70 ± 0.00
Longitude 13.03 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87375001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 717
Semi-minor axis of confidence ellipse (meter) 488
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 720
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 25
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.23472
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 87375001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-22 09:28:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2021-02-22T09:21:48.96 3.0 undecidable manual Sg 2.5 0
IV.TDS.HHZ. 2021-02-22T09:21:43.94 3.0 undecidable manual Sn -6.24 0
IV.ACER.HHZ. 2021-02-22T09:21:33.85 3.0 undecidable manual Sg 7.33 0
IV.ESCV.HHZ. 2021-02-22T09:21:30.35 3.0 undecidable manual Pg 13.74 0
IV.SARZ.HHZ. 2021-02-22T09:21:29.77 3.0 undecidable manual Sn -9.99 0
IV.PLMA.HHZ. 2021-02-22T09:21:17.98 3.0 undecidable manual Sg -0.35 0
MN.PDG.HHZ. 2021-02-22T09:21:09.67 3.0 undecidable manual Pn -5.69 0
CH.MUGIO.HHZ. 2021-02-22T09:21:04.02 3.0 undecidable manual Pn -4.18 0
IV.VAGA.HHZ. 2021-02-22T09:20:51.67 3.0 undecidable manual Sn -0.53 0
OT.OT14.EHZ. 2021-02-22T09:20:40.39 3.0 positive manual Pn -1.82 0
IT.LRNO.HNZ. 2021-02-22T09:20:33.74 3.0 undecidable manual Pg 0.83 0
IT.SULP.HGZ. 2021-02-22T09:20:19.13 3.0 negative manual P -2.28 0
IV.LAV9.HNZ. 2021-02-22T09:20:17.41 3.0 positive manual Pg 0.24 0
IV.MF5.EHZ. 2021-02-22T09:20:13.65 3.0 undecidable manual P 0
IV.MC2.EHZ. 2021-02-22T09:20:13.92 3.0 undecidable manual S 0
IV.TOLF.HHZ. 2021-02-22T09:20:12.10 3.0 negative manual P -2.61 0
IV.RM33.EHZ. 2021-02-22T09:20:12.99 0.1 undecidable manual S 144 0.2347 50 -0.13 96
IV.NRCA.HHZ. 2021-02-22T09:20:10.21 0.1 undecidable manual S 26 0.1502 122 -0.12 98
IV.RM33.EHZ. 2021-02-22T09:20:09.10 0.1 undecidable manual P 144 0.2347 50 0.03 98
IV.GAVE.EHZ. 2021-02-22T09:20:08.48 0.1 undecidable manual S 267 0.0971 134 -0.21 97
IV.LNSS.HHZ. 2021-02-22T09:20:08.58 0.1 undecidable manual S 173 0.0953 134 -0.08 100
IV.NRCA.HHZ. 2021-02-22T09:20:07.61 0.3 undecidable manual P 26 0.1502 122 0.15 73
IV.GAVE.EHZ. 2021-02-22T09:20:06.70 0.1 undecidable manual P 267 0.0971 134 0.19 98
IV.LNSS.HHZ. 2021-02-22T09:20:06.77 0.3 undecidable manual P 173 0.0953 134 0.28 72
IV.MC2.EHZ. 2021-02-22T09:20:06.27 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.3 0.000228 0.16 AML other m 2021-02-22T09:20:08.75
IV.GAVE.EHE. ML:1.3 0.0002455 0.12 AML other m 2021-02-22T09:20:08.70
IV.LNSS.HHN. ML:1 0.00011605 0.22 AML other m 2021-02-22T09:20:09.20
IV.LNSS.HHE. ML:1 0.0001375 0.52 AML other m 2021-02-22T09:20:09.06
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download