Earthquake with magnitude of ML 1.0 on date 12-10-2021 and time 01:40:49 (UTC) in region 3 km W Poggiodomo (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km W Poggiodomo (PG), on

  • 12-10-2021 01:40:49 (UTC)
  • 12-10-2021 03:40:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.718, 12.905 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
Poggiodomo PG 3 117 117
Sant'Anatolia di Narco PG 6 564 681
Scheggino PG 6 461 1142
Vallo di Nera PG 7 364 1506
Monteleone di Spoleto PG 8 599 2105
Cascia PG 9 3217 5322
Cerreto di Spoleto PG 12 1075 6397
Spoleto PG 14 38218 44615
Ferentillo TR 14 1913 46528
Campello sul Clitunno PG 16 2442 48970
Polino TR 16 233 49203
Montefranco TR 17 1276 50479
Norcia PG 18 4957 55436
Leonessa RI 18 2435 57871
Arrone TR 19 2763 60634
Sellano PG 19 1079 61713

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Terni (111501 inhabitants)
31 Km SE of Foligno (57155 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
60 Km SE of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
73 Km E of Viterbo (67173 inhabitants)
81 Km N of Guidonia Montecelio (88673 inhabitants)
84 Km N of Tivoli (56533 inhabitants)
98 Km NE 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2021-10-12
01:40:49
42.7177 12.905 10 2021-10-12
02:05:56
Sala Sismica INGV-Roma 96455071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 01:40:49 ± 0.09
Latitude 42.7177 ± 0.0054
Longitude 12.9050 ± 0.0073
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 96455071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 755
Semi-minor axis of confidence ellipse (meter) 375
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 140
Circular confidence region, given by single value of horizontal uncertainty (meter) 750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.34534
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 96455071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 02:05:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-10-12T01:41:03.03 0.6 undecidable manual S 23 0.3453 50 0.17 47
IV.NRCA.HHZ. 2021-10-12T01:40:57.94 0.6 undecidable manual S 53 0.1925 115 -0.23 48
IV.FDMO.HHZ. 2021-10-12T01:40:57.32 1.0 negative manual P 23 0.3453 50 -0.09 24
IV.ARRO.EHZ. 2021-10-12T01:40:57.20 0.6 undecidable manual S 217 0.1718 118 -0.27 48
IV.LNSS.HHZ. 2021-10-12T01:40:56.82 0.6 undecidable manual S 139 0.152 121 0.03 51
IV.ARRO.EHZ. 2021-10-12T01:40:54.29 0.3 positive manual P 217 0.1718 118 -0.01 76
IV.NRCA.HHZ. 2021-10-12T01:40:54.65 0.1 positive manual P 53 0.1925 115 -0.05 100
IV.LNSS.HHZ. 2021-10-12T01:40:54.09 1.0 undecidable manual P 139 0.152 121 0.19 25
IV.GAVE.EHZ. 2021-10-12T01:40:53.86 0.6 undecidable manual S 197 0.027 164 0.22 50
IV.GAVE.EHZ. 2021-10-12T01:40:52.36 1.0 undecidable manual P 197 0.027 164 0.28 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.1 0.0002465 1.9 AML other m 2021-10-12T01:40:53.02
IV.GAVE.EHE. ML:1.1 0.0002145 0.26 AML other m 2021-10-12T01:40:54.36
IV.NRCA.HHE. ML:0.9 4.765E-5 0.52 AML other m 2021-10-12T01:40:58.10
IV.NRCA.HHN. ML:0.8 4.45E-5 0.58 AML other m 2021-10-12T01:41:05.19
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