Earthquake with magnitude of ML 1.2 on date 31-10-2021 and time 03:13:13 (Italy) in region 2 km N Sant'Angelo in Pontano (MC)

A magnitude ML 1.2 earthquake occured in region: 2 km N Sant'Angelo in Pontano (MC), on

  • 31-10-2021 02:13:13 (UTC)
  • 31-10-2021 03:13:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1180, 13.3940 at 23 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
Sant'Angelo in Pontano MC 2 1436 1436
Ripe San Ginesio MC 4 852 2288
Loro Piceno MC 6 2401 4689
Colmurano MC 6 1263 5952
San Ginesio MC 6 3498 9450
Montappone FM 7 1682 11132
Falerone FM 7 3337 14469
Gualdo MC 7 815 15284
Penna San Giovanni MC 7 1108 16392
Monte Vidon Corrado FM 8 731 17123
Massa Fermana FM 8 963 18086
Servigliano FM 9 2336 20422
Urbisaglia MC 9 2628 23050
Monte San Martino MC 10 765 23815
Camporotondo di Fiastrone MC 11 563 24378
Mogliano MC 11 4696 29074
Cessapalombo MC 11 512 29586
Sarnano MC 12 3264 32850
Montegiorgio FM 12 6851 39701
Belmonte Piceno FM 12 646 40347
Petriolo MC 13 1998 42345
Smerillo FM 13 365 42710
Tolentino MC 14 20069 62779
Monteleone di Fermo FM 14 395 63174
Belforte del Chienti MC 14 1886 65060
Santa Vittoria in Matenano FM 14 1330 66390
Caldarola MC 14 1823 68213
Monsampietro Morico FM 14 659 68872
Francavilla d'Ete FM 15 964 69836
Montefalcone Appennino FM 15 424 70260
Amandola FM 16 3629 73889
Magliano di Tenna FM 16 1452 75341
Montelparo FM 16 778 76119
Montottone FM 17 979 77098
Grottazzolina FM 17 3398 80496
Rapagnano FM 17 2145 82641
Pollenza MC 17 6618 89259
Monte San Pietrangeli FM 17 2458 91717
Corridonia MC 17 15430 107147
Serrapetrona MC 18 966 108113
Comunanza AP 18 3166 111279
Monte Rinaldo FM 18 379 111658
Force AP 19 1354 113012
Torre San Patrizio FM 19 2048 115060
Bolognola MC 19 142 115202
Monte Giberto FM 20 801 116003
Ortezzano FM 20 774 116777
Montefortino FM 20 1178 117955

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km S of Ancona (100861 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
59 Km E of Foligno (57155 inhabitants)
82 Km E of Perugia (166134 inhabitants)
85 Km N of L'Aquila (69753 inhabitants)
86 Km SE of Fano (60888 inhabitants)
87 Km NE of Terni (111501 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
96 Km SE of Pesaro (94582 inhabitants)
99 Km NW of Pescara (121014 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-10-31
02:13:13
43.1177 13.3937 23 2021-10-31
02:18:21
Sala Sismica INGV-Roma 97102301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-31 02:13:13 ± 0.24
Latitude 43.1177 ± 0.0162
Longitude 13.3937 ± 0.0086
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97102301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1609
Semi-minor axis of confidence ellipse (meter) 794
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 179
Circular confidence region, given by single value of horizontal uncertainty (meter) 1610.0
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 15
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29588
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 97102301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-31 02:18:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MNTT.EHZ. 2021-10-31T02:13:22.26 0.6 undecidable manual S 111 0.1574 137 0.51 44
IV.CSP1.EHZ. 2021-10-31T02:13:21.65 0.6 undecidable manual S 259 0.1403 141 0.24 49
IV.GUMA.HHZ. 2021-10-31T02:13:20.31 0.6 undecidable manual S 218 0.0692 159 -0.04 51
IV.NRCA.HHZ. 2021-10-31T02:13:20.78 3.0 undecidable manual P -0.07 0
IV.MNTP.HNE. 2021-10-31T02:13:20.10 0.6 undecidable manual S 70 0.0585 162 -0.14 50
IV.CING.HHZ. 2021-10-31T02:13:20.15 0.6 positive manual P 331 0.2959 117 0.19 47
IV.FDMO.HHZ. 2021-10-31T02:13:19.15 0.3 positive manual P 250 0.2374 124 0.04 74
IV.MF5.EHZ. 2021-10-31T02:13:19.78 0.6 undecidable manual S -0.68 0.78
IV.MC2.EHZ. 2021-10-31T02:13:19.41 3.0 positive manual P 0.22 0
IV.MNTT.EHZ. 2021-10-31T02:13:18.07 0.1 negative manual P 111 0.1574 137 0.01 100
IV.MMO1.EHZ. 2021-10-31T02:13:18.67 3.0 positive manual P 0.06 0
IV.PF6.EHE. 2021-10-31T02:13:17.92 0.1 undecidable manual P 278 0.1466 139 -0.02 100
IV.GUMA.HHZ. 2021-10-31T02:13:17.14 0.3 negative manual P 218 0.0692 159 -0.11 75
IV.CSP1.EHZ. 2021-10-31T02:13:17.88 1.0 undecidable manual P 259 0.1403 141 0.01 25
IV.MNTP.HNE. 2021-10-31T02:13:16.91 0.1 undecidable manual P 70 0.0585 162 -0.28 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HHN. ML:1.2 0.000121342965 0.2 AML other m 2021-10-31T02:13:20.57
IV.GUMA.HHE. ML:1.1 0.00008224016000000001 0.2608 AML other m 2021-10-31T02:13:20.83
IV.NRCA.HHE. ML:0.9 0.000027099999999999998 0.64 AML other m 2021-10-31T02:13:27.40
IV.NRCA.HHN. ML:0.7 0.000016899999999999997 0.1 AML other m 2021-10-31T02:13:28.07
IV.GUMA.HNE. ML:1.3 0.00012668845500000002 0.3296 AML other m 2021-10-31T02:13:20.94
IV.GUMA.HNN. ML:1.3 0.00015173342 1.1296 AML other m 2021-10-31T02:13:28.12
IV.CSP1.EHE. ML:0.9 0.000050459905 0.0992 AML other m 2021-10-31T02:13:21.76
IV.CSP1.EHN. ML:1.0 0.000055384274999999996 0.08 AML other m 2021-10-31T02:13:21.73
IV.MNTT.EHE. ML:1.3 0.00010528773499999999 0.08 AML other m 2021-10-31T02:13:24.34
IV.MNTT.EHN. ML:1.0 0.000049342554999999994 0.1584 AML other m 2021-10-31T02:13:22.89
IV.FDMO.HHE. ML:0.4 0.000010913138 0.12 AML other m 2021-10-31T02:13:24.07
IV.FDMO.HHN. ML:0.4 0.000009481413000000001 0.0816 AML other m 2021-10-31T02:13:24.48
IV.CING.HNE. ML:3.2 0.0056813035 0.6496 AML other m 2021-10-31T02:13:30.89
IV.CING.HNN. ML:3.3 0.0068370375 1.0992 AML other m 2021-10-31T02:13:26.12
IV.CING.HHE. ML:0.7 0.00002150712 2.52 AML other m 2021-10-31T02:13:25.99
IV.CING.HHN. ML:0.4 0.000008946705 0.08 AML other m 2021-10-31T02:13:26.62
IV.NRCA.HNE. ML:1.6 0.00012414755 0.8112 AML other m 2021-10-31T02:13:26.59
IV.NRCA.HNN. ML:1.8 0.00018746869999999998 0.7504 AML other m 2021-10-31T02:13:25.48
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download